CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Total
Balance at Dec. 31, 2018	$ 120	$ 66,433	$ 78,467	$ (63,747)	$ 81,273
Balance (in shares) at Dec. 31, 2018	12,012
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock		(4,831)		4,831
Stock-based compensation		1,714			1,714
Forfeited restricted stock (in shares)	(18)
Net share settlement related to restricted stock vesting		(78)			(78)
Net share settlement related to restricted stock vesting (in shares)	(6)
Net income			(4,698)		(4,698)
Balance at Dec. 31, 2019	$ 120	63,238	73,769	(58,916)	78,211
Balance (in shares) at Dec. 31, 2019	11,988
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock		(4,290)		4,290	0
Stock-based compensation		1,805			1,805
Restricted stock award grant (in shares)	77
Forfeited restricted stock (in shares)	(16)
Net share settlement related to restricted stock vesting		(61)			(61)
Net share settlement related to restricted stock vesting (in shares)	(11)
Net income			4,746		4,746
Balance at Dec. 31, 2020	$ 120	$ 60,692	$ 78,515	$ (54,626)	$ 84,701
Balance (in shares) at Dec. 31, 2020	12,038