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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Operating activities:    
Net loss $ (3,386) $ (3,625)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 10 10
Gain on disposal of property and equipment   (29)
Stock-based compensation 176 178
Changes in lease liability (70) (52)
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (585) (749)
Accounts payable and other current liabilities (798) (2,052)
Net cash used in operating activities (4,653) (6,319)
Investing activities:    
Purchase of property, plant and equipment (4) (3)
Proceeds from sale of property and equipment   29
Net cash provided by (used in) investing activities (4) 26
Financing activities:    
Proceeds, net of issuance costs, from issuing common stock (issuance costs paid) 18,307 4,056
Payment of preferred stock dividend (101) (101)
Net cash provided by (used in) financing activities 18,206 3,955
Effect of exchange rate changes on cash and cash equivalents (92) (7)
Net (decrease) in cash and cash equivalents 13,457 (2,345)
Cash and cash equivalents, beginning of period 11,885 17,504
Cash and cash equivalents, end of period 25,342 15,159
Supplemental cash flow information:    
Cash received during the period for: Interest 32 135
Lease liability   (1,505)
Right-of-use asset   1,385
Non cash financing activities:    
Accrual of preferred stock dividends $ 50 $ 50