CONDENSED 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		(4,558)		4,558
Stock-based compensation		589			589
Net share settlement related to restricted stock vesting		(72)			(72)
Net share settlement related to restricted stock vesting (in shares)	(5)
Net income (loss)			1,501		1,501
Balance at Mar. 31, 2019	$ 120	62,392	79,968	(59,189)	83,291
Balance (in shares) at Mar. 31, 2019	12,007
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		(4,327)		4,327
Stock-based compensation		471			471
Forfeited restricted stock (in shares)	(15)
Net share settlement related to restricted stock vesting		(57)			(57)
Net share settlement related to restricted stock vesting (in shares)	(11)
Net income (loss)			(2,551)		(2,551)
Balance at Mar. 31, 2020	$ 120	$ 59,325	$ 71,218	$ (54,589)	$ 76,074
Balance (in shares) at Mar. 31, 2020	11,962