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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Operating activities:    
Net loss $ (5,641) $ (5,525)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 16 15
Gain on disposal of property and equipment   (29)
Stock-based compensation 289 361
Changes in lease liability (81) (61)
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (711) (676)
Accounts payable and other current liabilities (654) (2,415)
Net cash used in operating activities (6,782) (8,330)
Investing activities:    
Purchase of property, plant and equipment (54) (7)
Proceeds from sale of property and equipment   29
Net cash provided by (used in) investing activities (54) 22
Financing activities:    
Proceeds, net of issuance costs, from issuing common stock (issuance costs paid) 18,307 4,049
Payment of preferred stock dividend (151) (151)
Net cash provided by financing activities 18,156 3,898
Effect of exchange rate changes on cash and cash equivalents (75) (126)
Net increase in cash and cash equivalents 11,245 (4,536)
Cash and cash equivalents, beginning of period 11,885 17,504
Cash and cash equivalents, end of period 23,130 12,968
Supplemental cash flow information:    
Cash received during the period for: Interest 36 177
Lease liability   (1,505)
Right-of-use asset   1,385
Non cash financing activities:    
Accrual of preferred stock dividends $ 50 $ 50