CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2019	$ 11,847	$ 6	$ 293	$ 285,099	$ (273,474)	$ (77)
Begining Balance (in shares) at Dec. 31, 2019		568	29,339,101
Issuance of common stock from stock option awards	(2)		$ 1	(3)
Issuance of common stock from stock options awards, shares			19,805
Stock-based compensation expense	75			75
Net income	38				38
Ending Balance at Mar. 31, 2020	11,958	$ 6	$ 294	285,171	(273,436)	(77)
Ending Balance (in shares) at Mar. 31, 2020		568	29,358,906
Beginning Balance at Dec. 31, 2019	11,847	$ 6	$ 293	285,099	(273,474)	(77)
Begining Balance (in shares) at Dec. 31, 2019		568	29,339,101
Net income	2,077
Ending Balance at Jun. 30, 2020	14,113	$ 6	$ 295	285,286	(271,397)	(77)
Ending Balance (in shares) at Jun. 30, 2020		568	29,421,456
Beginning Balance at Mar. 31, 2020	11,958	$ 6	$ 294	285,171	(273,436)	(77)
Begining Balance (in shares) at Mar. 31, 2020		568	29,358,906
Issuance of common stock from stock option awards	30		$ 1	29
Issuance of common stock from stock options awards, shares			62,550
Stock-based compensation expense	86			86
Net income	2,039				2,039
Ending Balance at Jun. 30, 2020	14,113	$ 6	$ 295	285,286	(271,397)	$ (77)
Ending Balance (in shares) at Jun. 30, 2020		568	29,421,456
Beginning Balance at Dec. 31, 2020	29,943	$ 6	$ 353	293,400	(263,816)
Begining Balance (in shares) at Dec. 31, 2020		568	35,281,183
Issuance of common stock from stock option awards	(120)		$ 4	(124)
Issuance of common stock from stock options awards, shares			366,294
Stock-based compensation expense	67			67
Net income	1,032				1,032
Ending Balance at Mar. 31, 2021	30,922	$ 6	$ 357	293,343	(262,784)
Ending Balance (in shares) at Mar. 31, 2021		568	35,647,477
Beginning Balance at Dec. 31, 2020	$ 29,943	$ 6	$ 353	293,400	(263,816)
Begining Balance (in shares) at Dec. 31, 2020		568	35,281,183
Issuance of common stock from stock options awards, shares	1,521,937
Net income	$ 1,619
Ending Balance at Jun. 30, 2021	30,983	$ 6	$ 363	292,811	(262,197)
Ending Balance (in shares) at Jun. 30, 2021		568	36,284,382
Beginning Balance at Mar. 31, 2021	30,922	$ 6	$ 357	293,343	(262,784)
Begining Balance (in shares) at Mar. 31, 2021		568	35,647,477
Issuance of common stock from stock option awards	(670)		$ 6	(676)
Issuance of common stock from stock options awards, shares			611,905
Issuance of restricted common stock	76			76
Restricted stock units issued, shares			25,000
Stock-based compensation expense	68			68
Net income	587				587
Ending Balance at Jun. 30, 2021	$ 30,983	$ 6	$ 363	$ 292,811	$ (262,197)
Ending Balance (in shares) at Jun. 30, 2021		568	36,284,382