Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Total	Series A Preferred Stock [Member]	Series B Preferred Stock [Member]	Series C Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2020	$ (132,245)					$ 4,454		$ (136,699)
Temporary Equity, Balance, shares at Dec. 31, 2020		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Dec. 31, 2020		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Dec. 31, 2020					1,445,065
Stock-based compensation expense	188					188
Net income (loss)	(6,582)							(6,582)
Balance at Mar. 31, 2021	(138,639)					4,642		(143,281)
Temporary Equity, Balance, shares at Mar. 31, 2021		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Mar. 31, 2021		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Mar. 31, 2021					1,445,065
Balance at Dec. 31, 2020	(132,245)					4,454		(136,699)
Temporary Equity, Balance, shares at Dec. 31, 2020		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Dec. 31, 2020		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Dec. 31, 2020					1,445,065
Stock option exercises, shares					15,451
Net income (loss)	(12,130)
Balance at Jun. 30, 2021	(144,011)					4,818		(148,829)
Temporary Equity, Balance, shares at Jun. 30, 2021		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Jun. 30, 2021		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Jun. 30, 2021					1,460,516
Balance at Mar. 31, 2021	(138,639)					4,642		(143,281)
Temporary Equity, Balance, shares at Mar. 31, 2021		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Mar. 31, 2021		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Mar. 31, 2021					1,445,065
Stock option exercises	15					15
Stock option exercises, shares					15,451
Stock-based compensation expense	161					161
Net income (loss)	(5,548)							(5,548)
Balance at Jun. 30, 2021	(144,011)					4,818		(148,829)
Temporary Equity, Balance, shares at Jun. 30, 2021		11,563,819	10,154,819	6,734,590
Temporary Equity, Balance at Jun. 30, 2021		$ 46,567	$ 51,084	$ 35,573
Balance, shares at Jun. 30, 2021					1,460,516
Balance at Dec. 31, 2021	$ 17,284				$ 4	138,181		(120,901)
Temporary Equity, Balance, shares at Dec. 31, 2021		0	0	0
Temporary Equity, Balance at Dec. 31, 2021		$ 0	$ 0	$ 0
Balance, shares at Dec. 31, 2021	40,389,975				40,389,975
Stock option exercises	$ 3					3
Stock option exercises, shares					4,828
Issuance of common stock, net of issuance costs, shares					700,549
Issuance of common stock, net of issuance costs	3,791					3,791
Stock-based compensation expense	1,137					1,137
Unrealized loss on short-term investments	(50)						(50)
Net income (loss)	3,069							3,069
Balance at Mar. 31, 2022	25,234				$ 4	143,112	(50)	(117,832)
Temporary Equity, Balance, shares at Mar. 31, 2022		0	0	0
Temporary Equity, Balance at Mar. 31, 2022		$ 0	$ 0	$ 0
Balance, shares at Mar. 31, 2022					41,095,352
Balance at Dec. 31, 2021	$ 17,284				$ 4	138,181		(120,901)
Temporary Equity, Balance, shares at Dec. 31, 2021		0	0	0
Temporary Equity, Balance at Dec. 31, 2021		$ 0	$ 0	$ 0
Balance, shares at Dec. 31, 2021	40,389,975				40,389,975
Stock option exercises, shares	4,828				4,828
Net income (loss)	$ (3,846)
Balance at Jun. 30, 2022	$ 19,623				$ 4	144,448	(82)	(124,747)
Temporary Equity, Balance, shares at Jun. 30, 2022		0	0	0
Temporary Equity, Balance at Jun. 30, 2022		$ 0	$ 0	$ 0
Balance, shares at Jun. 30, 2022	41,152,790				41,152,790
Balance at Mar. 31, 2022	$ 25,234				$ 4	143,112	(50)	(117,832)
Temporary Equity, Balance, shares at Mar. 31, 2022		0	0	0
Temporary Equity, Balance at Mar. 31, 2022		$ 0	$ 0	$ 0
Balance, shares at Mar. 31, 2022					41,095,352
Stock option exercises, shares					0
Issuance of common stock, net of issuance costs, shares					57,438
Issuance of common stock, net of issuance costs	94					94
Stock-based compensation expense	1,242					1,242
Unrealized loss on short-term investments	(32)						(32)
Net income (loss)	(6,915)							(6,915)
Balance at Jun. 30, 2022	$ 19,623				$ 4	$ 144,448	$ (82)	$ (124,747)
Temporary Equity, Balance, shares at Jun. 30, 2022		0	0	0
Temporary Equity, Balance at Jun. 30, 2022		$ 0	$ 0	$ 0
Balance, shares at Jun. 30, 2022	41,152,790				41,152,790