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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Operating activities:    
Net loss $ (1,220) $ (1,842)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 5 6
Gain on disposal of property and equipment   (29)
Stock-based compensation 91 85
Changes in lease liability (10)  
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (874) (1,215)
Accounts payable and other current liabilities (799) (689)
Net cash used in operating activities (2,807) (3,684)
Investing activities:    
Purchase of property, plant and equipment (4) (2)
Proceeds from sale of property and equipment   29
Net cash provided by (used in) investing activities (4) 27
Financing activities:    
Proceeds from issuing common stock, net of issuance costs (Payments of issuance costs)   4,106
Payment of preferred stock dividend (50) (50)
Net cash provided by (used in) financing activities (50) 4,056
Effect of exchange rate changes on cash and cash equivalents (101) 31
Net (decrease) in cash and cash equivalents (2,962) 430
Cash and cash equivalents, beginning of period 11,885 17,504
Cash and cash equivalents, end of period 8,923 17,934
Supplemental cash flow information:    
Cash received during the period for: Interest 28 79
Cash received during the period for: Taxes
Lease liability   (1,505)
Right-of-use asset   1,385
Non cash financing activities:    
Accrual of preferred stock dividends $ 50 $ 50