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Condensed Consolidated Financial Statement Detail (Details)
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3 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | 3 Months Ended | 3 Months Ended | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
USD ($)
|
Mar. 31, 2013
|
Dec. 31, 2013
USD ($)
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Feb. 28, 2010
Five year warrants issued in February 2010 [Member]
USD ($)
|
Mar. 31, 2014
Five year warrants issued in February 2010 [Member]
USD ($)
|
Dec. 31, 2013
Five year warrants issued in February 2010 [Member]
USD ($)
|
Feb. 28, 2010
Five year warrants issued in February 2010 [Member]
|
Mar. 31, 2012
Five year warrants issued in March 2012 [Member]
USD ($)
|
Mar. 31, 2014
Five year warrants issued in March 2012 [Member]
USD ($)
|
Mar. 31, 2014
Five year warrants issued in March 2012 [Member]
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Dec. 31, 2013
Five year warrants issued in March 2012 [Member]
USD ($)
|
Mar. 31, 2012
Five year warrants issued in March 2012 [Member]
|
Jun. 30, 2009
Warrants issued to private investors [Member]
USD ($)
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Mar. 31, 2014
Warrants issued to private investors [Member]
USD ($)
|
Jun. 30, 2009
Warrants issued to private investors [Member]
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Mar. 31, 2014
Options Contract [Member]
USD ($)
Contract
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Mar. 31, 2013
Options Contract [Member]
USD ($)
|
Mar. 31, 2014
Options Contract [Member]
EUR (€)
|
Mar. 31, 2014
Option Contract 1 [Member]
EUR (€)
|
Mar. 31, 2014
Option Contract 2 [Member]
EUR (€)
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Mar. 31, 2014
Demand Deposits [Member]
USD ($)
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Dec. 31, 2013
Demand Deposits [Member]
USD ($)
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Mar. 31, 2014
Money Market Funds [Member]
USD ($)
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Dec. 31, 2013
Money Market Funds [Member]
USD ($)
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Mar. 31, 2014
Common stock options and restricted stock units [Member]
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Mar. 31, 2013
Common stock options and restricted stock units [Member]
|
Mar. 31, 2014
Warrants for common stock [Member]
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Mar. 31, 2013
Warrants for common stock [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||||||||||||||||||||||||||||||
| Antidilutive securities excluded from computation of earnings per share (in shares) | 20,005,000 | 22,635,000 | 5,732,000 | 6,459,000 | 14,273,000 | 16,176,000 | |||||||||||||||||||||||||
| Cash and Cash Equivalents [Line Items] | |||||||||||||||||||||||||||||||
| Cash equivalents | $ 10,100,000 | $ 18,900,000 | $ 63,600,000 | $ 82,800,000 | |||||||||||||||||||||||||||
| Short-term Investments [Abstract] | |||||||||||||||||||||||||||||||
| Short-term investments, U.S. treasury securities | 19,996,000 | 19,990,000 | [1] | ||||||||||||||||||||||||||||
| Derivative [Line Items] | |||||||||||||||||||||||||||||||
| Notional amount of derivative liability | 15,000,000 | ||||||||||||||||||||||||||||||
| Number of foreign exchange option contracts | 2 | ||||||||||||||||||||||||||||||
| Derivative, amount of hedged item | 1,500,000 | 15,000,000 | |||||||||||||||||||||||||||||
| Derivative, premiums | 1,500,000 | ||||||||||||||||||||||||||||||
| Derivative fair value | 200,000 | ||||||||||||||||||||||||||||||
| Derivative, loss | 100,000 | 200,000 | |||||||||||||||||||||||||||||
| Accrued liabilities [Abstract] | |||||||||||||||||||||||||||||||
| Accrued payroll and other benefits | 2,401,000 | 3,009,000 | |||||||||||||||||||||||||||||
| Accrued management incentive compensation | 1,050,000 | 4,386,000 | |||||||||||||||||||||||||||||
| Other | 1,444,000 | 2,539,000 | |||||||||||||||||||||||||||||
| Total | 4,895,000 | 9,934,000 | [1] | ||||||||||||||||||||||||||||
| Class of Warrant or Right [Line Items] | |||||||||||||||||||||||||||||||
| Warrants outstanding (in shares) | 1,260,000 | 12,109,418 | 14,834,577 | 347,826 | |||||||||||||||||||||||||||
| Exercise price (in dollars per share) | $ 10.50 | $ 1.76 | $ 19.50 | ||||||||||||||||||||||||||||
| Fair value of warrant liability | 1,200,000 | 46,600,000 | 68,700,000 | 700,000 | |||||||||||||||||||||||||||
| Gain (loss) on revaluation of warrant liability | 500,000 | 19,500,000 | |||||||||||||||||||||||||||||
| Warrant Term | 5 years | 5 years | 5 years | ||||||||||||||||||||||||||||
| Reclassification of warrant liability to equity | $ 2,500,000 | ||||||||||||||||||||||||||||||
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