Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Public Offering [Member] Common Stock [Member]	Public Offering [Member] Additional Paid-in Capital [Member]	Public Offering [Member] Retained Earnings [Member]	Public Offering [Member]	The $8.5 Million Registered Direct Offering [Member] Common Stock [Member]	The $8.5 Million Registered Direct Offering [Member] Additional Paid-in Capital [Member]	The $8.5 Million Registered Direct Offering [Member] Retained Earnings [Member]	The $8.5 Million Registered Direct Offering [Member]	The $10.5 Million Registered Direct Offering [Member] Common Stock [Member]	The $10.5 Million Registered Direct Offering [Member] Additional Paid-in Capital [Member]	The $10.5 Million Registered Direct Offering [Member] Retained Earnings [Member]	The $10.5 Million Registered Direct Offering [Member]	Restricted Stock Units (RSUs) [Member] Management [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] Management [Member] Additional Paid-in Capital [Member]	Restricted Stock Units (RSUs) [Member] Management [Member]	Restricted Stock Units (RSUs) [Member] Board of Directors [Member] Common Stock [Member]	Restricted Stock Units (RSUs) [Member] Board of Directors [Member] Additional Paid-in Capital [Member]	Restricted Stock Units (RSUs) [Member] Board of Directors [Member]	Restricted Stock Units (RSUs) [Member] Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019																				6,825,183
Balance at Dec. 31, 2019																				$ 7	$ 103,433	$ (101,070)	$ 2,370
Common stock issued (in shares)	5,476,190				1,789,474				2,038,836
Common stock issued	$ 5	$ 10,268	$ 0	$ 10,273	$ 2	$ 7,825	$ 0	$ 7,827	$ 2	$ 9,763	$ 0	$ 9,765
Restricted stock units issued (in shares)													71,624			39,807			26,172
Restricted stock units issued														$ 232	$ 232		$ 613	$ 613
Common stock grants to former directors to settle board compensation obligations (in shares)																				29,625
Common stock grants to former directors to settle board compensation obligations																				$ 0	148	0	148
Exercise of common stock warrants (in shares)																				470
Exercise of common stock warrants																				$ 0	0	0	0
Share-based compensation																					2,952		2,952
Net loss																						(15,004)	(15,004)
Balance (in shares) at Dec. 31, 2020																				16,297,381
Balance at Dec. 31, 2020																				$ 16	135,234	(116,074)	19,176
Common stock issued (in shares)																				453,832
Common stock issued																				$ 1	1,941	0	1,942
Restricted stock units issued (in shares)																			40,100	78,372
Restricted stock units issued														$ 214	$ 214
Share-based compensation																					1,661		1,661
Net loss																						(12,623)	$ (12,623)
Exercise of common stock options (in shares)																				1,580			1,580
Exercise of common stock options																					5		$ 5
Balance (in shares) at Dec. 31, 2021																				16,871,265
Balance at Dec. 31, 2021																				$ 17	$ 139,055	$ (128,697)	$ 10,375