Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock At The Market Equity Offering Program	Common Stock	Additional Paid-in Capital At The Market Equity Offering Program	Additional Paid-in Capital	Accumulated Deficit At The Market Equity Offering Program	Accumulated Deficit	At The Market Equity Offering Program	Total
Beginning Balance at Dec. 31, 2020		$ 1		$ 218,020		$ (200,527)		$ 17,494
Beginning Balance, Shares at Dec. 31, 2020		12,891,934
Issuance of common stock for services		$ 0		80		0		80
Issuance of common stock for services (Shares)		3,604
Share-based compensation, net of forfeitures		$ 0		166		0		166
Stock options exercised, net		$ 0		33		0		33
Stock options exercised, net (Shares)		8,634
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards				(40)		0		(40)
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards (Shares)		(1,905)
Warrants exercised, net		$ 0		114		0		114
Warrants exercised, net (Shares)		20,447
Issuance of common stock in connection with the "at-the-market" equity offering program	$ 0		$ 2,705		$ 0		$ 2,705
Issuance of common stock in connection with the "at-the-market" equity offering program (Shares)	123,230
Offering costs related to the issuance of common stock in connection with the "at-the-market" equity offering program		$ 0		(126)		0		(126)
Net loss		0		0		(3,667)		(3,667)
Ending Balance at Mar. 31, 2021		$ 1		220,952		(204,194)		16,759
Ending Balance, Shares at Mar. 31, 2021		13,045,944
Beginning Balance at Dec. 31, 2020		$ 1		218,020		(200,527)		17,494
Beginning Balance, Shares at Dec. 31, 2020		12,891,934
Net loss								(10,851)
Ending Balance at Sep. 30, 2021		$ 1		228,633		(211,378)		17,256
Ending Balance, Shares at Sep. 30, 2021		13,363,889
Beginning Balance at Mar. 31, 2021		$ 1		220,952		(204,194)		16,759
Beginning Balance, Shares at Mar. 31, 2021		13,045,944
Share-based compensation, net of forfeitures		$ 0		67		0		67
Stock options exercised, net		$ 0		127		0		127
Stock options exercised, net (Shares)		20,945
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards		$ 0		0		0		0
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards (Shares)		(1,921)
Warrants exercised, net		$ 0		0		0		0
Warrants exercised, net (Shares)		1,944
Issuance of common stock in connection with the "at-the-market" equity offering program	$ 0		7,266		0		7,266
Issuance of common stock in connection with the "at-the-market" equity offering program (Shares)	271,119
Offering costs related to the issuance of common stock in connection with the "at-the-market" equity offering program		$ 0		(321)		0		(321)
Net loss		0		0		(3,556)		(3,556)
Ending Balance at Jun. 30, 2021		$ 1		228,091		(207,750)		20,342
Ending Balance, Shares at Jun. 30, 2021		(13,338,031)
Share-based compensation, net of forfeitures		$ 0		47		0		47
Stock options exercised, net		$ 0		0		0		0
Stock options exercised, net (Shares)		21
Warrants exercised, net		$ 0		0		0		0
Warrants exercised, net (Shares)		3,778
Issuance of common stock in connection with the "at-the-market" equity offering program	$ 0		$ 540		$ 0		$ 540
Issuance of common stock in connection with the "at-the-market" equity offering program (Shares)	22,059
Offering costs related to the issuance of common stock in connection with the "at-the-market" equity offering program		$ 0		(45)		0		(45)
Net loss		0		0		(3,628)		(3,628)
Ending Balance at Sep. 30, 2021		$ 1		228,633		(211,378)		17,256
Ending Balance, Shares at Sep. 30, 2021		13,363,889
Beginning Balance at Dec. 31, 2021		$ 2		244,884		(217,602)		27,284
Beginning Balance, Shares at Dec. 31, 2021		15,155,026
Share-based compensation, net of forfeitures		$ 0		716		0		716
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards		$ 0		(79)		0		(79)
Shares held back in settlement of tax obligation for shares issued in connection with restricted stock awards (Shares)		(9,234)
Costs related to the sale of common stock and warrants in connection with the registered direct offering		$ 0		(32)		0		(32)
Net loss		0		0		(5,636)		(5,636)
Ending Balance at Mar. 31, 2022		$ 2		245,489		(223,238)		22,253
Ending Balance, Shares at Mar. 31, 2022		15,145,792
Beginning Balance at Dec. 31, 2021		$ 2		244,884		(217,602)		27,284
Beginning Balance, Shares at Dec. 31, 2021		15,155,026
Net loss								(14,117)
Ending Balance at Sep. 30, 2022		$ 2		245,566		(231,719)		13,849
Ending Balance, Shares at Sep. 30, 2022		15,085,792
Beginning Balance at Mar. 31, 2022		$ 2		245,489		(223,238)		22,253
Beginning Balance, Shares at Mar. 31, 2022		15,145,792
Share-based compensation, net of forfeitures		$ 0		423		0		423
Restricted stock award forfeitures		$ 0		(509)		0		(509)
Restricted stock award forfeitures (Shares)		(60,000)
Net loss		$ 0		0		(2,070)		(2,070)
Ending Balance at Jun. 30, 2022		$ 2		245,403		(225,308)		20,097
Ending Balance, Shares at Jun. 30, 2022		15,085,792
Share-based compensation, net of forfeitures		$ 0		163		0		163
Net loss		0		0		(6,411)		(6,411)
Ending Balance at Sep. 30, 2022		$ 2		$ 245,566		$ (231,719)		$ 13,849
Ending Balance, Shares at Sep. 30, 2022		15,085,792