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Stockholders' Equity - Additional Information (Detail) (USD $)
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1 Months Ended | 3 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | ||||||||||||||||||
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Feb. 28, 2013
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Oct. 30, 2012
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Oct. 29, 2012
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Aug. 31, 2012
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Jun. 30, 2012
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Jun. 14, 2012
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Oct. 30, 2012
Common Stock [Member]
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Aug. 31, 2012
Common Stock [Member]
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Aug. 31, 2011
Common Stock [Member]
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Dec. 31, 2012
Common Stock [Member]
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Oct. 30, 2012
Warrant [Member]
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Aug. 31, 2012
Warrant [Member]
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Dec. 31, 2012
Warrant [Member]
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Dec. 31, 2012
Baytree [Member]
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Dec. 14, 2012
Baytree [Member]
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Jun. 30, 2011
Restatement Adjustment [Member]
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Jun. 14, 2012
Stock Option Plan 2010 [Member]
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Jun. 30, 2012
June 2012 Warrants [Member]
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Dec. 31, 2012
June 2012 Warrants [Member]
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Jun. 30, 2011
June 2012 Warrants [Member]
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Jun. 14, 2012
Advisory Agreement [Member]
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Jun. 14, 2012
Advisory Agreement [Member]
Restricted Stock
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Jun. 30, 2012
Private Placement [Member]
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Oct. 30, 2012
Subsequent Event [Member]
Private Placement [Member]
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| Stockholders Equity Note Disclosure [Line Items] | ||||||||||||||||||||||||||||
| Common stock, authorized | 145,000,000 | 145,000,000 | 145,000,000 | |||||||||||||||||||||||||
| Preferred stock, authorized | 5,000,000 | 5,000,000 | 5,000,000 | |||||||||||||||||||||||||
| Preferred stock, par value | $ 0.001 | $ 0.001 | $ 0.001 | |||||||||||||||||||||||||
| Preferred stock, issued | 0 | 0 | 0 | |||||||||||||||||||||||||
| Preferred stock, outstanding | 0 | 0 | 0 | |||||||||||||||||||||||||
| Shares of common stocks issued | 100,000 | 241,436 | 2,535,093 | 603,594 | 120,719 | 2,813,000 | 100,000 | 1,207,185 | 241,437 | |||||||||||||||||||
| Warrants issued | 2,907,347 | 2,907,347 | 562,551 | 48,287 | ||||||||||||||||||||||||
| Net proceeds from issuance of common stock and warrants | $ 4,000 | $ 77,000 | $ 981,000 | $ 0 | $ 1,126,000 | |||||||||||||||||||||||
| Advisory service agreement period | 24 months | |||||||||||||||||||||||||||
| Warrant to purchase restricted shares of common stock | 1,837,777 | 1,837,777 | ||||||||||||||||||||||||||
| Warrant term | 5 years | 5 years | 5 years | 5 years | ||||||||||||||||||||||||
| Common stock initial exercise price | $ 0.41 | $ 0.41 | $ 1.84 | $ 0.41 | $ 0.41 | |||||||||||||||||||||||
| Shares of common stock outstanding under the option plan | 4,536,949 | 3,415,053 | 3,415,053 | 2,097,841 | 1,535,500 | 710,000 | ||||||||||||||||||||||
| Accredated Investor Unit | 250,000 | 250,000 | 500,000 | |||||||||||||||||||||||||
| Common Stock Unit | 603,592 | 603,594 | 1,207,185 | |||||||||||||||||||||||||
| Warrant Units | 120,718 | 120,719 | 241,437 | |||||||||||||||||||||||||
| Prepaid Advisory Fees | 184,000 | 184,000 | 3,258,000 | |||||||||||||||||||||||||
| Amortization of prepaid advisory fees | 15,000 | 830,000 | 0 | 815,000 | ||||||||||||||||||||||||
| Warrants exercise price | $ 0.41 | $ 0.41 | $ 1.84 | $ 0.41 | $ 0.41 | |||||||||||||||||||||||
| Proceeds from Issuance or Sale of Equity | 77,000 | 231,000 | 672,000 | 241,436 | 603,594 | 1,690,063 | 48,287 | 338,013 | ||||||||||||||||||||
| Exercised | 400,000 | 100,000 | (100,000) | 2,000,000 | ||||||||||||||||||||||||
| Stock or Unit Option Plan Expense | 195,000 | |||||||||||||||||||||||||||
| Stock Options Expense Expected To Be Recognized | 5 years 9 months 28 days | |||||||||||||||||||||||||||
| Stock-based compensation | 0 | 0 | 38,000 | 29,000 | ||||||||||||||||||||||||
| Derivative Asset, Fair Value, Net | 4,000 | 2,375,000 | 2,375,000 | |||||||||||||||||||||||||
| Investment Options, Exercise Price | $ 16,000 | |||||||||||||||||||||||||||
| Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized | 36,000 | 36,000 | ||||||||||||||||||||||||||
| Common stock, par value | $ 0.001 | $ 0.001 | $ 0.001 | |||||||||||||||||||||||||
| Common Stock, Value, Issued | $ 44,000 | $ 47,000 | $ 47,000 | $ 184,000 | ||||||||||||||||||||||||