STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net loss	$ (4,100)	$ (5,125)	$ (1,302)	$ (1,320)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	3			3
Amortization of right-of-use asset - operating	14			22
Share-based compensation	141			16
Change in operating assets and liabilities:
Other current assets	(840)			(75)
Accounts payable	56			(293)
Accrued compensation and employee benefits	(560)			60
Accrued expenses and other liabilities	61			(99)
Net cash used in operating activities	(5,225)			(1,686)
Cash flows from investing activities:
Purchases of property and equipment	(6)			(3)
Net cash used in investing activities	(6)			(3)
Cash flows from financing activities:
Proceeds from the issuance of common stock	24,070
Common stock offering costs	(977)
Net cash provided by financing activities	23,093
Net increase (decrease) in cash and cash equivalents	17,862			(1,689)
Cash and cash equivalents, beginning of period	49,071		$ 6,674	8,363	$ 8,363
Cash and cash equivalents, end of period	66,933	$ 49,071		6,674	$ 49,071
Supplemental disclosure of noncash investing and financing transactions:
Purchases of property and equipment in accounts payable	$ 3
Vendor finance agreement				408
Leased assets obtained in exchange for operating lease liabilities				$ 49