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Related Party Transactions - Additional Information (Detail) (USD $)
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0 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 1 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | |||||
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Apr. 22, 2014
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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Jun. 30, 2014
Interest Expense
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Jun. 30, 2014
Interest Expense
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Apr. 21, 2014
Restricted Stock
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Apr. 21, 2014
Restricted Stock
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Jun. 30, 2014
Aston Capital Limited Liability Company
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Apr. 30, 2014
Aston Capital Limited Liability Company
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Dec. 31, 2013
Aston Capital Limited Liability Company
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Apr. 09, 2013
Aston Capital Limited Liability Company
Issuance of Equity
Restricted Stock
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Apr. 30, 2014
RVL One Limited Liability Company
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Jun. 30, 2014
RVL One Limited Liability Company
Agreement
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Dec. 31, 2013
RVL One Limited Liability Company
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Jun. 30, 2014
RVL One Limited Liability Company
Series G Redeemable Convertible Preferred Stock
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| Transactions with Third Party [Line Items] | ||||||||||||||||||
| Debt instrument amount | $ 2,700,000 | $ 2,700,000 | $ 3,500,000 | $ 1,000,000 | $ 10,800,000 | |||||||||||||
| Interest rate of debt | 9.00% | 9.00% | ||||||||||||||||
| Debt instrument maturity date | Apr. 01, 2016 | Apr. 01, 2015 | Apr. 01, 2015 | |||||||||||||||
| Debt instrument converted in to equity | 5,700,000 | 10,800,000 | 1,600,000 | |||||||||||||||
| Debt instrument principal amount | 5,700,000 | 5,700,000 | ||||||||||||||||
| Debt instrument interest percentage | 9.00% | 9.00% | ||||||||||||||||
| Accrued interest | 38,000 | 38,000 | ||||||||||||||||
| Interest Expenses | 372,000 | 459,000 | 313,000 | 344,000 | ||||||||||||||
| Number of separate investment agreements | 4 | |||||||||||||||||
| Proceeds from issuance of convertible preferred stock | 26,000,000 | 12,500,000 | ||||||||||||||||
| Proceeds from issuance of common stock | 4,760,000 | 5,000,000 | 192,000 | |||||||||||||||
| Number of common stock shares issued | 82,620,000 | 82,620,000 | 82,095,000 | 75,000 | ||||||||||||||
| Loans Receivable, Commercial, Trade Financing | 9,900,000 | |||||||||||||||||
| Restricted common stock agreed to be issued for services | 500,000 | |||||||||||||||||
| Restricted common stock agreed to be issued for services, vesting period | 3 years | |||||||||||||||||
| Restricted common stock agreed to be issued for services, vesting date | Sep. 25, 2013 | |||||||||||||||||
| Number of shares authorized for grant | 300,000 | |||||||||||||||||
| Stock options vesting period | 3 years | 3 years | ||||||||||||||||
| Monthly payment for underlying lease | 21,355 | |||||||||||||||||
| Related party transaction costs incurred | 116,000 | 97,000 | 207,000 | 165,000 | 33,000 | |||||||||||||
| Amounts due to related party | $ (452,000) | |||||||||||||||||