Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Debt - Schedule of Outstanding Long-Term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Current portion, net carrying amount $ (5,482) $ (7,012)
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 5,767 7,421
Total debt, unamortized discount (285) (409)
Total debt, net carrying amount 5,482 7,012
Current portion, outstanding principal (5,767) (7,421)
Current portion, unamortized discount 285 409
Current portion, net carrying amount $ (5,482) $ (7,012)