Quarterly report pursuant to Section 13 or 15(d) 03-31-2016

Debt - Schedule of Outstanding Long-Term Debt (Details)

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Debt - Schedule of Outstanding Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total debt, outstanding principal $ 15,981 $ 17,814
Total debt, unamortized discount (1,196) (1,449)
Total debt, net carrying amount 14,785 16,365
Current portion, outstanding principal (15,981) (17,814)
Current portion, unamortized discount (1,196) 1,449
Current portion, net carrying amount $ (14,785) $ (16,365)
Long-term debt, outstanding principal
Long-term debt, unamortized discount
Long-term debt
Hercules Term Loan [Member]    
Debt Instrument [Line Items]    
Total debt, outstanding principal $ 15,218 $ 17,051
Total debt, unamortized discount (1,186) (1,420)
Total debt, net carrying amount 14,032 15,631
Magna Note [Member]    
Debt Instrument [Line Items]    
Total debt, outstanding principal 763 763
Total debt, unamortized discount (10) (29)
Total debt, net carrying amount $ 753 $ 734