Condensed Consolidated Statements of Stockholders’ Equity (Deficit) - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		498,269
Beginning balance at Dec. 31, 2020	$ (68,793,000)	$ 1,000	$ 2,967,000	$ (71,761,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	$ 20,000		20,000
Exercise of stock options (in shares)	4,368	4,368
Vesting of early exercised stock options (in shares)		11,916
Vesting of early exercised stock options	$ 57,000		57,000
Share-based compensation	120,000		120,000
Net loss	(5,355,000)			(5,355,000)
Ending balance at Mar. 31, 2021	(73,951,000)	$ 1,000	3,164,000	(77,116,000)
Ending balance (in shares) at Mar. 31, 2021		514,553
Beginning balance (in shares) at Dec. 31, 2021		6,910,324
Beginning balance at Dec. 31, 2021	36,117,000	$ 7,000	136,173,000	(100,063,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for cash, net of issuance cost of $44 (in shares)		262,770
Issuance of common stock for cash, net of issuance cost of $44	$ 1,403,000		1,403,000
Exercise of stock options (in shares)	0
Share-based compensation	$ 328,000		328,000
Net loss	(8,491,000)			(8,491,000)
Ending balance at Mar. 31, 2022	$ 29,357,000	$ 7,000	$ 137,904,000	$ (108,554,000)
Ending balance (in shares) at Mar. 31, 2022		7,173,094