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Revolving Line of Credit - Additional Information (Detail) (USD $)
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6 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | 6 Months Ended | 6 Months Ended | ||||||||
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Jun. 30, 2013
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Jun. 30, 2013
Silicon Valley Bank
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Jun. 18, 2013
Silicon Valley Bank
Common Class A
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Jun. 30, 2013
Silicon Valley Bank
Common Class A
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Mar. 26, 2013
Silicon Valley Bank
Second Loan Modification Agreement
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Mar. 27, 2013
Silicon Valley Bank
Third Loan Modification Agreement
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Jun. 03, 2013
Line of Credit
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May 10, 2013
Line of Credit
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May 10, 2013
Subordinated Debt
Line of Credit
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May 10, 2013
Subordinated Debt
Line of Credit
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Jun. 30, 2013
Alteris
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Jun. 30, 2013
Alteris
Based on the equity funding in excess of $3,000 completed
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Jun. 30, 2013
Alteris
Silicon Valley Bank
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Jun. 30, 2013
Alteris
Revolving Credit Streamline Facility
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| Line of Credit Facility [Line Items] | ||||||||||||||
| Revolving line of credit facility | $ 6,500,000 | |||||||||||||
| Borrowing Base | 75.00% | |||||||||||||
| Borrowing base availability | 5,247,000 | |||||||||||||
| Bear interest rate | Greater of the bank’s prime rate or 4.00% plus 4.75% | Greater of the bank's prime rate or 4.00%, plus 2.00% | ||||||||||||
| Interest rate | 4.00% | 4.00% | ||||||||||||
| Line of credit facility, maturity date | Jun. 30, 2013 | Sep. 30, 2013 | ||||||||||||
| Interest rate excluding prime rate | 4.75% | 2.00% | ||||||||||||
| Line of credit, facility fee | 0.50% | |||||||||||||
| Reserve credit of subsidiary | 500,000 | |||||||||||||
| Final payment fee | 60,000 | 40,000 | ||||||||||||
| Equity funding in excess | 3,000,000 | |||||||||||||
| Borrowings outstanding under line of credit facility | 0 | |||||||||||||
| Expiration period of warrants issued | 7 years | 7 years | ||||||||||||
| Shares of common stock to purchase by warrants issued | 106,557 | 105,978 | ||||||||||||
| Exercise price of warrants issued | 1.83 | 1.84 | ||||||||||||
| Estimated fair value of warrant issued | 278,000 | |||||||||||||
| Common stock shares issued due to cashless exercise of warrants | 78,973 | 78,973 | ||||||||||||
| Loan discounts combined unamortized balance | 67,000 | |||||||||||||
| Net proceeds subordinated debt agreement | 3,400,000 | |||||||||||||
| Deposit for debt agreement | 500 | |||||||||||||
| Proceeds from issuance of common stock, net | $ 8,414,000 | $ 8,414,000 | ||||||||||||