CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (DEFICIT) - USD ($) $ in Thousands	Common Stock Class A Common stock	Common Stock Class B Common stock	Additional Paid-in Capital Private Placement [Member]	Additional Paid-in Capital	Accumulated Deficit	Private Placement [Member]	Total
Balance at the beginning at Dec. 31, 2020	$ 7	$ 3		$ 101,080	$ (80,259)		$ 20,831
Balance at the beginning (in shares) at Dec. 31, 2020	7,091,960	3,134,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Proceeds from stock option exercises				3			3
Proceeds from stock option exercises (in shares)	561
Stock-based compensation				677			677
Net loss					(5,067)		(5,067)
Balance at the ending at Mar. 31, 2021	$ 7	$ 3		101,760	(85,326)		16,444
Balance at the ending (in shares) at Mar. 31, 2021	7,092,521	3,134,162
Balance at the beginning at Dec. 31, 2021	$ 9	$ 4		118,599	(105,091)		13,521
Balance at the beginning (in shares) at Dec. 31, 2021	9,245,146	4,313,406
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock through Private Placement, net of issuance costs of $357			$ (110)			$ (110)
Proceeds from sale of common stock through Employee Stock Purchase Plan				192			192
Proceeds from sale of common stock through Employee Stock Purchase Plan (in shares)	42,345
Vesting of restricted stock units (in shares)	19,247
Stock-based compensation				1,105			1,105
Net loss					(8,149)		(8,149)
Balance at the ending at Mar. 31, 2022	$ 9	$ 4		$ 119,786	$ (113,240)		$ 6,559
Balance at the ending (in shares) at Mar. 31, 2022	9,306,738	4,313,406