CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) $ in Thousands	Common Stock	Paid-In Capital	Accumulated Deficit	Treasury Stock	Total
Balance at Dec. 31, 2019	$ 3	$ 319,758	$ (302,439)	$ (258)	$ 17,064
Balance, shares at Dec. 31, 2019	3,339,541
Net Loss			(15,505)		(15,505)
Common stock issued, net of issuance costs	$ 7	13,523			13,530
Common stock issued, net of issuance costs (in shares)	7,093,960
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		170			170
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes (in shares)	511
Balance at Sep. 30, 2020	$ 10	333,451	(317,944)	(258)	15,259
Balance, shares at Sep. 30, 2020	10,434,012
Balance at Jun. 30, 2020	$ 7	326,073	(308,193)	(258)	17,629
Balance, shares at Jun. 30, 2020	6,664,976
Net Loss			(9,751)		(9,751)
Common stock issued, net of issuance costs	$ 3	7,236			7,239
Common stock issued, net of issuance costs (in shares)	3,769,036
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		142			142
Balance at Sep. 30, 2020	$ 10	333,451	(317,944)	(258)	15,259
Balance, shares at Sep. 30, 2020	10,434,012
Balance at Dec. 31, 2020	$ 19	383,723	(326,013)	(258)	57,471
Balance, shares at Dec. 31, 2020	19,172,020
Net Loss			(13,438)		(13,438)
Common stock issued, net of issuance costs	$ 15	81,850			81,865
Common stock issued, net of issuance costs (in shares)	15,407,018
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		594			594
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes (in shares)	57,186
Minimum withholding taxes on net share settlements of equity awards		(150)			(150)
Balance at Sep. 30, 2021	$ 34	466,017	(339,451)	(258)	126,342
Balance, shares at Sep. 30, 2021	34,636,224
Balance at Jun. 30, 2021	$ 33	461,717	(334,883)	(258)	126,609
Balance, shares at Jun. 30, 2021	33,536,476
Net Loss			(4,568)		(4,568)
Common stock issued, net of issuance costs	$ 1	4,001			4,002
Common stock issued, net of issuance costs (in shares)	1,099,748
Stock compensation expense and related share issuances, net of shares withheld for the payment of taxes		299			299
Balance at Sep. 30, 2021	$ 34	$ 466,017	$ (339,451)	$ (258)	$ 126,342
Balance, shares at Sep. 30, 2021	34,636,224