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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating activities:    
Net loss $ (18,887) $ (8,445)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 43 20
Stock-based compensation 1,157 430
Changes in lease liability 172 (93)
Changes in operating assets and liabilities:    
Prepaid expenses and other assets (3,931) 124
Accounts payable, accrued and other current liabilities 2,906 30
Net cash used in operating activities (18,540) (7,934)
Investing activities:    
Purchase of property, plant and equipment (27) (96)
Net cash used in investing activities (27) (96)
Financing activities:    
Proceeds from issuing common stock and warrants net of issuance costs 17,371 25,160
Proceeds from the exercise of stock options and warrants, net of issuance costs 4,567 4,545
Payment of preferred stock dividend (201) (201)
Net cash provided by financing activities 21,737 29,504
Effect of exchange rate changes on cash and cash equivalents (17) 47
Net increase in cash and cash equivalents 3,153 21,521
Cash and cash equivalents, beginning of period 33,406 11,885
Cash and cash equivalents, end of period 36,559 33,406
Supplemental cash flow information:    
Interest 17 42
Research & Development Tax Credits 1,358 1,291
Non cash financing activities:    
Accrual of preferred stock dividends $ 50 $ 50