Annual report pursuant to Section 13 and 15(d)

Long Term Debt - Debt and Maturities (Details)

v3.19.1
Long Term Debt - Debt and Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Long-term debt [1] $ 10,830 $ 14,063
Less: current portion of long-term debt (3,201) (3,241)
Less: Discounts on warrants, net (479) (654)
Less: Debt Issuance Costs (32) (53)
Long-term debt, net of current portion 7,118 10,115
Future minimum loan payments:    
2019 3,201  
2020 1,272  
2021 6,357  
2022 0  
2023 0  
Total [1] 10,830 14,063
Business Loan and Security Agreement    
Debt Instrument [Line Items]    
Long-term debt 0 62
Future minimum loan payments:    
Total 0 62
Medium-term Notes | Term Loan Agreements    
Debt Instrument [Line Items]    
Long-term debt 3,828 6,657
Future minimum loan payments:    
Total 3,828 6,657
Construction Loans | Equipment Financing Agreements    
Debt Instrument [Line Items]    
Long-term debt 752 1,094
Future minimum loan payments:    
Total 752 1,094
Unsecured Debt | Promissory notes    
Debt Instrument [Line Items]    
Long-term debt 6,250 6,250
Future minimum loan payments:    
Total $ 6,250 $ 6,250
[1] Excludes the discounts on warrants, net and debt issuance costs