Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2019		0	16,616,165
Beginning balance at Dec. 31, 2019	$ (23,909)	$ 0	$ 2	$ 307,403	$ (331,314)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, net (in shares)		3,770,265
Stock issued	86,553			86,553
Preferred dividends declared	(1,241)			(1,241)
Stock issued in acquisition (in shares)			74,984
Stock issued in acquisition	5,035			5,035
Warrants exercised (in shares)			72,112
Warrants exercised	133			133
Reclassification of warrant liability to equity	1,924			1,924
Stock options exercised (in shares)			737,281
Stock options exercised	6,171			6,171
401(k) employer match (in shares)			16,952
401(k) employer match	669			669
Stock-based compensation expense (in shares)			25,724
Stock-based compensation expense	8,126			8,126
Net loss	(22,710)				(22,710)
Ending balance (in shares) at Dec. 31, 2020		3,770,265	17,543,218
Ending balance at Dec. 31, 2020	60,751	$ 0	$ 2	414,773	(354,024)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued, net (in shares)			1,324,185
Stock issued	10,871			10,871
Preferred dividends declared	(8,954)			(8,954)
Common stock issued relating to settlement of contingent consideration (in shares)			164,898
Common stock issued relating to settlement of contingent consideration	1,443			1,443
Warrants exercised (in shares)			1,184,641
Warrants exercised	58			58
Stock options exercised and RSUs vested (in shares)			400,326
Stock options exercised and RSUs vested	5,560			5,560
401(k) employer match (in shares)			62,918
401(k) employer match	1,112			1,112
Stock-based compensation expense	11,858			11,858
Net loss	(37,144)				(37,144)
Ending balance (in shares) at Dec. 31, 2021		3,770,265	20,680,186
Ending balance at Dec. 31, 2021	$ 45,555	$ 0	$ 2	$ 436,721	$ (391,168)