Annual report pursuant to Section 13 and 15(d)

RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Details)

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RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance $ 2,069,000 $ 4,401,000 $ 4,811,000 $ 6,723,000 $ 7,805,000 $ 8,360,000 $ 9,947,000 $ 12,112,000 $ 14,587,000 $ 18,329,000 $ 23,563,000 $ 12,048,000 [1] $ 6,723,000 $ 12,112,000 $ 12,048,000 [1] $ 6,723,000 $ 12,112,000 $ 12,048,000 [1] $ 6,723,000 $ 12,112,000 $ 12,048,000 [1]
Balance, shares 16,599,683 16,532,275     16,156,432 16,029,478     15,992,080 15,987,502                      
Issuance of common stock and warrants - registered direct offering, net of costs                                         13,971,000
Issuance of common stock – public offering, net of costs                                       1,556,000 1,602,000
Issuance of common stock - exercised options and RSU settlement                                     $ 36,000
Issuance of common stock, exercised options and RSU settlement, shares                                     100,104 22,500 3,400
Fair value of warrants issued                                     $ 92,000   $ 253,000
Stock-based compensation                                     1,571,000 $ 798,000 711,000
Net loss $ (2,244,000) $ (3,005,000) (896,000) (2,188,000) [2],[3] $ (2,200,000) $ (1,487,000) (1,796,000) (2,260,000) [2],[4] $ (2,838,000) $ (3,893,000) (5,379,000) (4,363,000) [2],[4] (3,084,000) [2],[3],[4],[5] (4,056,000) [2],[4] (9,742,000) [2],[4] (6,089,000) [2],[3],[4],[5] (5,543,000) [2],[4] (13,635,000) [2],[4] (8,333,000) (7,743,000) [6],[7],[8] (16,473,000) [6],[7]
Balance 194,000 $ 2,069,000 $ 4,401,000 4,811,000 6,723,000 $ 7,805,000 $ 8,360,000 9,947,000 12,112,000 $ 14,587,000 $ 18,329,000 23,563,000 $ 4,401,000 $ 8,360,000 $ 18,329,000 $ 2,069,000 $ 7,805,000 $ 14,587,000 194,000 6,723,000 12,112,000
Balance, shares   16,599,683 16,532,275     16,156,432 16,029,478     15,992,080 15,987,502   16,532,275 16,029,478 15,987,502 16,599,683 16,156,432 15,992,080      
Common Stock [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       $ 16,000       $ 16,000       $ 14,000 [1] $ 16,000 $ 16,000 $ 14,000 [1] $ 16,000 $ 16,000 $ 14,000 [1] $ 16,000 $ 16,000 $ 14,000 [1]
Balance, shares     16,478,237 16,462,215     15,998,336 15,996,658     15,987,502 13,652,164 [1] 16,462,215 15,996,658 13,652,164 [1] 16,462,215 15,996,658 13,652,164 [1] 16,462,215 15,996,658 13,652,164 [1]
Issuance of common stock and warrants - registered direct offering, net of costs                                         $ 2,000
Issuance of common stock and warrants - registered direct offering, net of costs, shares                                         2,142,860
Issuance of common stock – public offering, net of costs                                      
Issuance of common stock - public offering, net of costs, shares                                       355,309 190,782
Issuance of common stock - exercised options and RSU settlement                                     $ 1,000
Issuance of common stock, exercised options and RSU settlement, shares                                     182,707 110,248 10,852
Fair value of warrants issued                                      
Stock-based compensation                                    
Net loss                                    
Balance $ 17,000       $ 16,000       $ 16,000                   $ 17,000 $ 16,000 $ 16,000
Balance, shares 16,682,465     16,478,237 16,462,215     15,998,336 15,996,658     15,987,502             16,682,465 16,462,215 15,996,658
Additional Paid-in Capital [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       $ 98,086,000       $ 95,732,000       $ 79,197,000 [1] $ 98,086,000 $ 95,732,000 $ 79,197,000 [1] $ 98,086,000 $ 95,732,000 $ 79,197,000 [1] $ 98,086,000 $ 95,732,000 $ 79,197,000 [1]
Issuance of common stock and warrants - registered direct offering, net of costs                                         13,969,000
Issuance of common stock – public offering, net of costs                                       1,556,000 1,602,000
Issuance of common stock - exercised options and RSU settlement                                     35,000
Fair value of warrants issued                                     92,000   253,000
Stock-based compensation                                     1,571,000 798,000 711,000
Net loss                                    
Balance $ 99,889,000       $ 98,086,000       $ 95,732,000                   99,889,000 98,086,000 95,732,000
Retained Earnings [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       (91,379,000)       (83,636,000)       (67,163,000) [1] (91,379,000) (83,636,000) (67,163,000) [1] (91,379,000) (83,636,000) (67,163,000) [1] (91,379,000) (83,636,000) (67,163,000) [1]
Issuance of common stock and warrants - registered direct offering, net of costs                                        
Issuance of common stock – public offering, net of costs                                      
Issuance of common stock - exercised options and RSU settlement                                    
Fair value of warrants issued                                      
Stock-based compensation                                    
Net loss                                     (8,333,000) (7,743,000) (16,473,000)
Balance (99,712,000)       (91,379,000)       (83,636,000)                   (99,712,000) (91,379,000) (83,636,000)
Previously Reported [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance 5,416,000 $ 7,383,000 $ 7,711,000 9,547,000 9,905,000 $ 10,418,000 $ 11,890,000 13,934,000 16,224,000 $ 19,822,000 $ 24,754,000 13,006,000 9,547,000 13,934,000 13,006,000 9,547,000 13,934,000 13,006,000 9,547,000 13,934,000 13,006,000
Issuance of common stock and warrants - registered direct offering, net of costs                                         13,971,000
Issuance of common stock – public offering, net of costs                                       1,556,000 1,602,000
Issuance of common stock - exercised options and RSU settlement                                      
Fair value of warrants issued                                         253,000
Stock-based compensation                                       798,000 711,000
Net loss   (2,640,000) (814,000) (2,112,000) [2],[3]   (1,445,000) (1,681,000) (2,139,000) [2],[4]   (3,749,000) (5,077,000) (4,130,000) [2],[4] (2,926,000) [2],[3],[4],[5] (3,820,000) [2],[4] (9,207,000) [2],[4] (5,566,000) [2],[3],[4],[5] (5,265,000) [2],[4] (12,956,000) [2],[4]   (6,741,000) [6],[7],[8] (15,609,000) [6],[7]
Balance   5,416,000 7,383,000 7,711,000 9,547,000 9,905,000 10,418,000 11,890,000 13,934,000 16,224,000 19,822,000 24,754,000 7,383,000 10,418,000 19,822,000 5,416,000 9,905,000 16,224,000   9,547,000 13,934,000
Previously Reported [Member] | Common Stock [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       $ 16,000       $ 16,000       $ 14,000 $ 16,000 $ 16,000 $ 14,000 $ 16,000 $ 16,000 $ 14,000 $ 16,000 $ 16,000 $ 14,000
Balance, shares       16,462,215       15,996,658       13,652,164 16,462,215 15,996,658 13,652,164 16,462,215 15,996,658 13,652,164 16,462,215 15,996,658 13,652,164
Issuance of common stock and warrants - registered direct offering, net of costs                                         $ 2,000
Issuance of common stock and warrants - registered direct offering, net of costs, shares                                         2,142,860
Issuance of common stock – public offering, net of costs                                      
Issuance of common stock - public offering, net of costs, shares                                       355,309 190,782
Issuance of common stock - exercised options and RSU settlement                                      
Issuance of common stock, exercised options and RSU settlement, shares                                       110,248 10,852
Fair value of warrants issued                                        
Stock-based compensation                                      
Net loss                                      
Balance         $ 16,000       $ 16,000                     $ 16,000 $ 16,000
Balance, shares         16,462,215       15,996,658                     16,462,215 15,996,658
Previously Reported [Member] | Additional Paid-in Capital [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       $ 98,086,000       $ 95,732,000       $ 79,197,000 $ 98,086,000 $ 95,732,000 $ 79,197,000 $ 98,086,000 $ 95,732,000 $ 79,197,000 $ 98,086,000 $ 95,732,000 $ 79,197,000
Issuance of common stock and warrants - registered direct offering, net of costs                                         13,969,000
Issuance of common stock – public offering, net of costs                                       1,556,000 1,602,000
Issuance of common stock - exercised options and RSU settlement                                      
Fair value of warrants issued                                         253,000
Stock-based compensation                                       798,000 711,000
Net loss                                      
Balance         $ 98,086,000       $ 95,732,000                     98,086,000 95,732,000
Previously Reported [Member] | Retained Earnings [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       (88,555,000)       (81,814,000)       (66,205,000) (88,555,000) (81,814,000) (66,205,000) (88,555,000) (81,814,000) (66,205,000) (88,555,000) (81,814,000) (66,205,000)
Issuance of common stock and warrants - registered direct offering, net of costs                                        
Issuance of common stock – public offering, net of costs                                      
Issuance of common stock - exercised options and RSU settlement                                      
Fair value of warrants issued                                        
Stock-based compensation                                      
Net loss                                       (6,741,000) (15,609,000)
Balance         (88,555,000)       (81,814,000)                     (88,555,000) (81,814,000)
Revision of Prior Period, Reclassification, Adjustment [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance $ (3,347,000) (2,982,000) (2,900,000) (2,824,000) (2,100,000) (2,058,000) (1,943,000) (1,822,000) [6],[7] (1,637,000) (1,493,000) (1,191,000) (958,000) [6],[7] (2,824,000) (1,822,000) [6],[7] (958,000) [6],[7] (2,824,000) (1,822,000) [6],[7] (958,000) [6],[7] (2,824,000) (1,822,000) [6],[7] (958,000) [6],[7]
Net loss   (365,000) (82,000) (76,000) [2],[3]   (42,000) (115,000) (121,000) [2],[4]   (144,000) (302,000) (233,000) [2],[4] (158,000) [2],[3],[4],[5] (236,000) [2],[4] (535,000) [2],[4] (523,000) [2],[3],[4],[5] (278,000) [2],[4] (679,000) [2],[4]   (1,002,000) [6],[7],[8] (864,000) [6],[7]
Balance   $ (3,347,000) $ (2,982,000) (2,900,000) (2,824,000) $ (2,100,000) $ (2,058,000) (1,943,000) (1,822,000) [6],[7] $ (1,637,000) $ (1,493,000) (1,191,000) (2,982,000) (2,058,000) (1,493,000) (3,347,000) (2,100,000) (1,637,000)   (2,824,000) (1,822,000) [6],[7]
Revision of Prior Period, Reclassification, Adjustment [Member] | Common Stock [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance             [6],[7]       [6],[7] [6],[7] [6],[7] [6],[7] [6],[7] [6],[7] [6],[7]
Balance, shares                  
Net loss [6],[7]                                       [8]
Balance               [6],[7]                     [6],[7]
Balance, shares                                  
Revision of Prior Period, Reclassification, Adjustment [Member] | Additional Paid-in Capital [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance             [6],[7]       [6],[7] [6],[7] [6],[7] [6],[7] [6],[7] [6],[7] [6],[7]
Net loss [6],[7]                                       [8]
Balance               [6],[7]                     [6],[7]
Revision of Prior Period, Reclassification, Adjustment [Member] | Retained Earnings [Member]                                          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                                          
Balance       $ (2,824,000)       $ (1,822,000) [6],[7]       $ (958,000) [6],[7] $ (2,824,000) $ (1,822,000) [6],[7] $ (958,000) [6],[7] $ (2,824,000) $ (1,822,000) [6],[7] $ (958,000) [6],[7] $ (2,824,000) (1,822,000) [6],[7] (958,000) [6],[7]
Net loss [6],[7]                                       (1,002,000) [8] (864,000)
Balance         $ (2,824,000)       $ (1,822,000) [6],[7]                     $ (2,824,000) $ (1,822,000) [6],[7]
[1] June 30, 2021 total shareholders’ equity, as restated, reflects the impact of restatement adjustments related to periods prior to the year ended June 30, 2022. The impact of restatement is a decrease of $958,000 to accumulated deficit at June 30, 2021.
[2] Inventories. The Company did not properly evaluate its calculation of its excess and obsolescence reserve on its finished goods and raw materials inventories, resulting in an overstatement of inventories and an understatement of cost of sales. In addition, certain inventory components were not properly recorded at the lower of cost or net realizable value, resulting in an overstatement of inventory and an understatement of cost of sales. Further, certain loaner service packs and consigned inventory were not reconciled timely, resulting in an overstatement of inventory and an understatement of cost of sales. Lastly, the Company also corrected the cash flow presentation related to inventory write downs on the statement of cash flows.
[3] Revenue recognition. The Company improperly recognized revenue during the three months ended September 30, 2023 related to performance obligations satisfied during three months ended June 30, 2023, resulting in an understatement of revenue in the three months ended June 30, 2023 and an overstatement of revenue in the three months ended September 30, 2023.
[4] Other. The Company had various clearing accounts that were not reconciled timely, resulting in an understatement of accounts payable, overstatement of inventories, and understatement of cost of sales.
[5] Product warranty liability. The Company did not include certain product warranty-related expenses within the proper period in its calculation of its product warranty reserve estimate, resulting in an understatement of accrued expenses and an understatement of cost of sales.
[6] Inventories. The Company did not properly evaluate its calculation of its excess and obsolescence reserve on its finished goods and raw materials inventories, resulting in an overstatement of inventories and an understatement of cost of sales. In addition, certain inventory components were not properly recorded at the lower of cost or net realizable value, resulting in an overstatement of inventory and an understatement of cost of sales. Further, certain loaner service packs and consigned inventory were not reconciled timely, resulting in an overstatement of inventory and an understatement of cost of sales. Lastly, the Company also corrected the cash flow presentation related to inventory write downs on the statement of cash flows.
[7] Other. The Company had various clearing accounts that were not reconciled in a timely manner, resulting in misstatements of accounts payable, inventories and cost of sales.
[8] Revenue. The Company did not properly recognize revenue in the periods which the related performance obligations were satisfied for a certain contract with a customer. Additionally, the Company improperly recorded accounts receivable from the same contract with a customer as a reduction to its accounts payable owed to the customer prior to the right of offset conditions under ASC 210-20 being met. As a result, revenues, accounts receivable, and accounts payable were misstated.