Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Debt and Maturities (Details)

v3.19.2
Long-Term Debt - Debt and Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term debt $ 12,719 $ 10,830
Less: current portion of long-term debt (1,065) (3,201)
Less: discounts on warrants, net   (479)
Less: debt issuance costs (416) (32)
Long-term debt, net of current portion 11,238 7,118
Revolving credit facility    
Debt Instrument [Line Items]    
Long-term debt 2,150  
Medium-term Notes | Term Loan Agreements    
Debt Instrument [Line Items]    
Long-term debt 10,000 3,828
Construction Loans | Equipment Financing Agreements    
Debt Instrument [Line Items]    
Long-term debt $ 569 752
Unsecured Debt | Promissory notes    
Debt Instrument [Line Items]    
Long-term debt   $ 6,250