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Debt and Related Warrants - Capital Lease Obligations (Details) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Debt and Related Warrants    
Capital lease obligations future minimum lease payments $ 20,000 $ 31,000
Property and equipment under capital leases 31,000 31,000
Capital lease obligations accumulated depreciation and amortization 13,000 $ 2,000
Future minimum rental commitments    
2019 10,000  
2020 $ 10,000