Note 13 - Concentrations  | 
12 Months Ended | 
|---|---|
Jun. 30, 2017  | |
| Notes to Financial Statements | |
| Concentration Risk Disclosure [Text Block] | 
 NOTE  
1 
3  - CONCENTRATIONS 
Credit Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of temporary cash investments and unsecured trade accounts receivable. The Company maintains cash balances at a financial institution in San Diego, California. Our cash balance at this institution is secured by the Federal Deposit Insurance Corporation up to   $250,000.  As of  June 30,  
2017,  cash totaled approximately $121,000,  which consists of funds held in a non-interest bearing bank deposit account. The Company has not  experienced any losses in such accounts. Management believes that the Company is not  exposed to any significant credit risk with respect to its cash.Customer Concentrations During the   year ended  
 June 30, 2017,  we had three  major customers that each represented more than 10%  of our revenues on an individual basis, or approximately $524,000  or 58%  of our total revenues.Dur  ing the year ended  
 June 30, 2016,  we had three  major customers that each represented more than 10%  of our revenues on an individual basis, or approximately $285,000  or 51%  of our total revenues.Suppliers/Vendor Concentrations We obtain a limited number of components and supplies included in our products from a small group of suppliers. Dur  ing the year ended  
 June 30, 2017  we had three  suppliers who accounted for more than 10%  of our total purchases, on an individual basis. Purchases for these three  suppliers totaled $1,665,000  or 57%  of our total purchases.Dur 
ing the year ended  
 June 30, 2016  we had three  suppliers who accounted for more than 10%  of our total purchases, on an individual basis. Purchases for these three  suppliers totaled $793,000  or 66%  of our total purchases. |