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STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Cash flows from operating activities:    
Net loss $ (4,613) $ (4,256)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 6 16
Amortization of right-of-use asset - operating 71 49
Share-based compensation 25 124
Change in operating assets and liabilities:    
Other current assets (281) 259
Other assets (12)  
Accounts payable 83 (95)
Accrued compensation and employee benefits 92 8
Accrued expenses and other liabilities (101) 252
Net cash used in operating activities (4,730) (3,643)
Cash flows from investing activities:    
Purchases of property and equipment (6) (2)
Net cash used in investing activities (6) (2)
Cash flows from financing activities:    
Proceeds from the issuance of common stock 49,644 7,281
Common stock offering costs (1,905) (368)
Repayment of principal on vendor finance agreement (271) (231)
Net cash provided by financing activities 47,468 6,682
Net increase in cash and cash equivalents 42,732 3,037
Cash and cash equivalents, beginning of period 8,363 6,608
Cash and cash equivalents, end of period 51,095 9,645
Supplemental cash flow information:    
Interest paid 7 6
Income tax refund received 9 151
Supplemental disclosure of noncash investing and financing transactions:    
Vendor finance agreement 137 118
Proceeds receivable from the issuance of common stock 30  
Common stock offering costs accrued but not yet paid 336 14
Leased assets obtained in exchange for operating lease liabilities, upon extension and adoption $ 49 $ 60