Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Debt and Maturities (Details)

v3.19.1
Long-Term Debt - Debt and Maturities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term debt [1] $ 10,032 $ 10,830
Less: current portion of long-term debt (2,844) (3,201)
Less: Discounts on warrants, net (434) (479)
Less: Debt Issuance Costs (27) (32)
Long-term debt, net of current portion 6,727 7,118
Medium-term Notes | Term Loan Agreements    
Debt Instrument [Line Items]    
Long-term debt 3,121 3,828
Construction Loans | Equipment Financing Agreements    
Debt Instrument [Line Items]    
Long-term debt 661 752
Unsecured Debt | Promissory notes    
Debt Instrument [Line Items]    
Long-term debt $ 6,250 $ 6,250
[1] Excludes the discounts on warrants, net and debt issuance costs