Notes Payable (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended | 6 Months Ended | 1 Months Ended | |||||||||||
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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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Mar. 31, 2014
Oxford Finance, LLC
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Jun. 30, 2014
Oxford Finance, LLC
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Jun. 30, 2014
Oxford Loan Agreement, Amortization Date of April 1, 2015
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Jun. 30, 2014
Oxford Loan Agreement, Amortization Date of April 1, 2016
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Jun. 30, 2014
Oxford Loan Agreement, Amortization Date of April 1, 2017
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Jun. 30, 2014
Series KK Warrants and other fees to lenders
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Mar. 31, 2014
Second Amended Platinum Note
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Jun. 30, 2014
Second Amended Platinum Note
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Mar. 31, 2014
Second Amended Platinum Note
Base Rate
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Mar. 31, 2014
Second Amended Platinum Note
Oxford Loan Agreement, Interest Rate
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Mar. 31, 2014
GECC, MidCap Financial SBIC and LP (MidCap)
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Jun. 30, 2014
GECC, MidCap Financial SBIC and LP (MidCap)
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Jun. 30, 2014
Oxford Finance, LLC
Series KK warrants
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Debt Instrument [Line Items] | ||||||||||||||||||
Debt face amount | $ 30,000,000 | |||||||||||||||||
Debt instrument, interest rate | 8.50% | |||||||||||||||||
Number of shares underlying warrant issued | 391,032 | |||||||||||||||||
Exercise price of warrant issued, dollars per share | 1.918 | |||||||||||||||||
Debt Instrument, Term | 48 months | 36 months | 24 months | |||||||||||||||
Debt Instrument, Final Payment Multiplier; Percent item type | 7.95% | 8.95% | 9.95% | |||||||||||||||
Notes Payable | 30,000,000 | 3,200,000 | ||||||||||||||||
Debt Instrument, Unamortized Discount (Premium), Net | 3,000,000 | |||||||||||||||||
Unamortized debt discount | 809,560 | 809,560 | 743,062 | 2,700,000 | ||||||||||||||
Deferred Finance Costs, Net | 108,000 | |||||||||||||||||
Debt issuance cost | 120,000 | |||||||||||||||||
Repayments of Long-term Debt | 26,700,000 | |||||||||||||||||
Debt Instrument, pre-payment Fee, Fee Amount | 500,000 | |||||||||||||||||
Debt Instrument, end-of-term, Fee Amount | 1,000,000 | |||||||||||||||||
Interest Expense, Debt | 914,000 | 465,000 | 1,900,000 | 828,000 | ||||||||||||||
Interest rate in addition to Prime rate | 6.75% | 0.125% | ||||||||||||||||
Debt Instrument, Interest Rate, Stated Percentage | 10.00% | |||||||||||||||||
Derivative, Gain (Loss) on Derivative, Net | (4,000) | 0 | (3,000) | 298,000 | ||||||||||||||
Long-term Debt, Fair Value | 3,900,000 | |||||||||||||||||
Debt Instrument, Unused Borrowing Capacity, Amount | 31,800,000 | |||||||||||||||||
Interest Expense Recorded Related To Amortization | $ 195,000 | $ 121,000 | $ 437,000 | $ 243,000 |