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Organization (Details) (USD $)
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3 Months Ended | 0 Months Ended | 0 Months Ended | 3 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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Apr. 04, 2014
Subsequent Event [Member]
Common Stock [Member]
Shelf Registration [Member]
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Apr. 04, 2014
Subsequent Event [Member]
Shelf Registration [Member]
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Jul. 03, 2013
Common Stock [Member]
Shelf Registration [Member]
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Jul. 03, 2013
Common Stock [Member]
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Jul. 03, 2013
Shelf Registration [Member]
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Mar. 31, 2014
Shelf Registration [Member]
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Mar. 31, 2014
Line Of Credit With FGI [Member]
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Mar. 31, 2014
8% Subordinated Convertible Notes Due 2016 [Member]
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May 11, 2011
8% Subordinated Convertible Notes Due 2016 [Member]
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| Organization (Details) [Line Items] | |||||||||||||
| Retained Earnings (Accumulated Deficit) | $ (185,555,000) | $ (181,719,000) | |||||||||||
| Line of Credit Facility, Maximum Borrowing Capacity | 7,500,000 | ||||||||||||
| Line of Credit Facility, Amount Outstanding | 2,700,000 | ||||||||||||
| Line of Credit Facility, Current Borrowing Capacity | 4,800,000 | ||||||||||||
| Shelf Registration Authorized Amount | 50,000,000 | 50,000,000 | |||||||||||
| Shelf Registartion Public Float Threshold | 75,000,000 | 75,000,000 | |||||||||||
| Shelf Registration Units Sold (in Shares) | 2,030,000 | 1,730,000 | 1,730,000 | ||||||||||
| Shelf Registration Unit Price (in Dollars per share) | $ 3.40 | $ 1.25 | |||||||||||
| Shelf Registration Units Sold Share Component Per Unit (in Shares) | 1 | 1 | 1 | ||||||||||
| Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in Shares) | 1 | 1 | |||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Share) | $ 4.20 | $ 1.25 | $ 1.25 | ||||||||||
| Proceeds from Issuance of Common Stock and Warrants | 6,100,000 | 1,700,000 | |||||||||||
| Warrants Exercised During the Period (in Shares) | 800,000 | ||||||||||||
| Proceeds from Warrant Exercises | 1,000,000 | 1,000,000 | |||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 8.00% | 8.00% | |||||||||||
| Cash | $ 3,597,000 | $ 4,583,000 | $ 3,909,000 | $ 6,878,000 | |||||||||