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Consolidated Statements of Cash Flows - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating activities    
Net loss $ (15,284) $ (29,678)
Adjustments to reconcile net loss to net cash used in operating activities:    
In process research and development, non-cash portion   17,339
Stock-based compensation 662 699
Non-cash lease expense 24 21
Depreciation 48 46
Change in assets and liabilities, net of the effects of the asset acquisitions:    
Prepaid expenses and other assets 396 33
Accounts payable (1,162) 1,123
Accrued and other liabilities 182 (347)
Net cash used in operating activities (15,134) (10,764)
Investing activities    
Cash acquired in connection with asset acquisitions   180
Transaction costs in connection with asset acquisitions (583) (107)
Purchases of property and equipment (3) (4)
Net cash (used in) provided by investing activities (586) 69
Financing activities    
Proceeds from equity offering 24,000 7,500
Issuance costs (2,089) (695)
Exercise of stock options 115 53
Net cash provided by financing activities 22,026 6,858
Net increase (decrease) in cash 6,306 (3,837)
Net foreign exchange difference (8) 3
Cash at beginning of year 10,089 13,923
Cash at end of year $ 16,387 10,089
Supplemental non-cash investing and financing transactions:    
Common stock and warrants issued in connection with asset acquisitions   17,030
Net assets assumed in connection with asset acquisitions   201
Unpaid transaction costs in accounts payable and accrued expenses related to asset acquisitions   $ 583
Placement warrants issued in connection with equity financing   289