Quarterly report pursuant to Section 13 or 15(d)

Notes Payable - Schedule of Notes Payable (Details)

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Notes Payable - Schedule of Notes Payable (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Total notes payable, current portion $ 272 $ 311
Total notes payable, non-current portion 8,549 8,600
Green Bank    
Total notes payable, current portion 272 295
Total notes payable, non-current portion 8,549 8,569
Capital Equipment Leases    
Total notes payable, current portion 0 16
Total notes payable, non-current portion $ 0 $ 31