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CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Cash flows used in operating activities:      
Net loss $ (1,087) $ (3,150)  
Adjustments to reconcile net loss to net cash used in operating activities:      
Depreciation and amortization 94 443  
Amortization of deferred financing costs and debt discount 122 168  
Noncash lease expenses 4 0  
Change in fair value of warrants (1,667) (210)  
Share-based compensation expense 12 49  
Increases (decreases) in cash caused by changes in operating assets and liabilities:      
Accounts receivable 191 (212)  
Inventories 0 16  
Other current assets 405 16  
Other assets 14 1  
Accounts payable and accrued expenses 410 (405)  
Deferred revenues 0 (25)  
Other long-term liabilities 0 39  
Net cash used in operating activities (1,502) (3,270)  
Cash flows used in investing activities:      
Purchases of property and equipment (11) (6)  
Net cash used in investing activities (11) (6)  
Cash flows (used in) provided by financing activities:      
Payment of financing lease liability (18) (28)  
Proceeds from sale of common stock, net 0 1,919  
Net cash (used in) provided by financing activities (18) 1,891  
Effect of exchange rate changes on cash and cash equivalents 0 (4)  
Net decrease in cash and cash equivalents (1,531) (1,389)  
Cash, cash equivalents, and restricted cash at beginning of period 17,592 5,301 $ 5,301
Cash, cash equivalents, and restricted cash at end of period 16,061 3,912 $ 17,592
Cash paid during period for:      
Interest $ 227 $ 347