Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents [note 6]	$ 35,853	$ 16,664
Prepaid expenses and other assets	1,122	670
Total current assets	36,975	17,334
Restricted cash [note 6]	50	50
Property and equipment, net [note 7]	42	57
Right-of-use assets [note 11]	146	329
Other assets [note 8]	187	187
License agreement [note 4 and 5]	1,864	2,087
Goodwill	1,034	1,034
Total assets	40,298	21,078
Current liabilities:
Accounts payable	332	859
Accrued liabilities other	584	304
Accrued clinical liabilities	453	387
Accrued compensation	1,474	1,116
Current portion of long-term obligations [note 11]	92	203
Total current liabilities	2,935	2,869
Long-term obligations [note 11]	77	159
Total liabilities	3,012	3,028
Commitments and contingencies [note 11]
Stockholders' equity:
Common stock, $0.001 par value, 150,000,000 shares authorized, 6,111,735 and 1,474,258 issued and outstanding at December 31, 2020 and December 31, 2019, respectively.	76	41
Additional paid-in capital	97,640	63,709
Accumulated deficit	(60,434)	(45,704)
Accumulated other comprehensive income	4	4
Total stockholders' equity	37,286	18,050
Total liabilities and stockholders' equity	40,298	21,078
Series A Convertible Preferred Stock [Member]
Stockholders' equity:
Convertible preferred stock, value
Series B Convertible Preferred Stock [Member]
Stockholders' equity:
Convertible preferred stock, value