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Significant Accounting Policies - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended |  | 6 Months Ended |  |  | 6 Months Ended |  |  | 6 Months Ended |  |  | 6 Months Ended |  |  |  | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 Segment | Jun. 30, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Foreign Exchange Contract | Jun. 30, 2014 Foreign Exchange Contract | Dec. 31, 2013 Foreign Exchange Contract | Jun. 30, 2014 Embedded Derivative Financial Instruments | Jun. 30, 2013 Embedded Derivative Financial Instruments | Dec. 31, 2013 Embedded Derivative Financial Instruments | Dec. 31, 2012 Embedded Derivative Financial Instruments | Jun. 30, 2014 Effect of a hypothetical 10% increase in the market price of common shares | Jun. 30, 2014 Warrants Issued October 2009 | Jun. 30, 2014 Top Three Customers Gross Product Sales | Jun. 30, 2013 Top Three Customers Gross Product Sales | Jun. 30, 2014 Top Three Customers Accounts Receivable | Jun. 30, 2013 Top Three Customers Accounts Receivable | Jun. 30, 2014 Convertible Debt | Jun. 30, 2014 Convertible Debt 2012 Notes | Dec. 31, 2013 Convertible Debt 2012 Notes | Jun. 30, 2014 Convertible Debt 2014 Notes | May 31, 2014 Convertible Debt 2014 Notes | Jun. 30, 2014 Convertible Debt 2014 Notes Non Cash Items | Jun. 30, 2014 Warrant | Dec. 31, 2013 Warrant | Jun. 30, 2014 Maximum | Dec. 31, 2013 Maximum Embedded Derivative Financial Instruments | Jun. 30, 2014 Maximum Embedded Derivative Financial Instruments | Dec. 31, 2013 Minimum Embedded Derivative Financial Instruments | Jun. 30, 2014 Minimum Embedded Derivative Financial Instruments
Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue | $ 0 | $ 1,833,000 | $ 0 | $ 1,833,000 | $ 1,703,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales discount percentage | 2.00% |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales discount term |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short term highly liquid instruments, maturity date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90 days |  |  |  |
Trade receivables, credit period |  |  | 30 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Carrying value include debt discount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,500,000 | 0 | 700,000 | 27,900,000 | 27,900,000 | 30,800,000 |  |  |  |  |  |  |
Concentration risk percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 95.00% | 96.00% | 96.00% | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, amount outstanding |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrant derivative liability |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500,000 | 6,900,000 |  |  |  |  |
Derivative liability fair value assumptions, risk-free rate |  |  | 0.04% |  | 0.12% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.30% |  |  |  |  |  |  |  |  |
Derivative liability fair value assumptions, term |  |  | 3 months 18 days |  | 9 months 18 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6 years 7 months 6 days | 4 years 1 month 6 days | 3 years 3 months 18 days | 2 years 9 months 18 days
Derivative liability fair value assumptions, dividend yield |  |  | 0.00% |  | 0.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23.80% |  |  |  |  |  |  |  |  |
Derivative liability fair value assumptions, volatility rate |  |  | 120.00% |  | 99.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 76.00% |  |  |  |  |  |  |  |  |
Increase (Decrease) in the fair value of warrant derivative liability |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,100,000 | (2,400,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on change in fair value of derivative liability | 3,011,000 | 18,841,000 | 7,404,000 | 22,461,000 |  |  | (887,000) |  |  | 5,200,000 | 5,977,000 |  |  |  | 2,200,000 |  |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |
Compensation expense (income) for change in fair value of warrants issued to former employees |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (200,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Market price of common stock | $ 1.76 |  | $ 1.76 |  |  |  |  |  |  |  |  |  |  | $ 1.94 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hypothetical increase in market price of common shares |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Change of control obligation |  |  |  |  |  |  |  |  |  |  |  |  | 140,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum repayment of future revenue and receivables |  |  |  |  |  |  |  |  |  |  |  |  | 150,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative liability fair value assumption, coupon rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.50% | 12.50% | 9.90% | 9.90%
Derivative liability fair value assumptions, market yields |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 29.40% | 15.20% | 9.00% | 10.10%
Long term debt redemption feature |  |  |  |  |  | $ 14,600,000 |  |  |  | $ 6,100,000 |  | $ 11,100,000 |  |  |  |  |  |  |  |  |  |  | $ 3,300,000 |  |  |  |  |  |  |  |  |
Number of operating segments |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
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