CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock As Reported	Common Stock	Additional Paid-in Capital As Reported	Additional Paid-in Capital	Retained Earnings As Reported	Retained Earnings Adjustments	Retained Earnings	Treasury Stock As Reported	Treasury Stock	As Reported	Adjustments	Total
Balance at Dec. 31, 2017		$ 121		$ 68,667			$ 65,460		$ (67,760)			$ 66,488
Balance (in shares) at Dec. 31, 2017		12,142
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock				(4,013)					4,013
Stock-based compensation				1,164								1,164
Issuance of shares for acquisition				750								750
Forfeited restricted stock		$ (1)		1
Forfeited restricted stock (in shares)		(128)
Net share settlement related to restricted stock vesting				(136)								(136)
Net share settlement related to restricted stock vesting (in shares)		(2)
Net income (loss)							12,204					12,204
Balance at Dec. 31, 2018	$ 120	$ 120	$ 66,433	66,433	$ 77,664		78,467	$ (63,747)	(63,747)	$ 80,470		81,273
Balance (in shares) at Dec. 31, 2018	12,012	12,012
Increase (Decrease) in Stockholders' Equity
Correction of error (Note 14)						$ 803					$ 803
Issuance of treasury stock				(4,831)					4,831			0
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 (loss)							(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