Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in  Capital	Retained Earnings	Treasury Stock	Adjustments	Adjustments Retained Earnings	As Reported	As Reported Common Stock	As Reported Additional Paid-in  Capital	As Reported Retained Earnings	As Reported Treasury Stock
Balance (in shares) at Dec. 31, 2017		12,142,000
Balance at Dec. 31, 2017	$ 66,488	$ 121	$ 68,667	$ 65,460	$ (67,760)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of treasury stock			(2,094)		2,094
Stock-based compensation	(136)		(136)
Net share settlement related to restricted stock vesting (in shares)		(2,000)
Net share settlement related to restricted stock vesting	(40)		(40)
Net income	1,035			1,035
Forfeited restricted stock (in shares)		(49,000)
Balance (in shares) at Mar. 31, 2018		12,091,000
Balance at Mar. 31, 2018	67,347	$ 121	66,397	66,495	(65,666)
Balance (in shares) at Dec. 31, 2017		12,142,000
Balance at Dec. 31, 2017	66,488	$ 121	68,667	65,460	(67,760)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,579
Balance (in shares) at Jun. 30, 2018		12,015,000
Balance at Jun. 30, 2018	70,125	$ 120	65,738	69,039	(64,772)
Balance (in shares) at Mar. 31, 2018		12,091,000
Balance at Mar. 31, 2018	67,347	$ 121	66,397	66,495	(65,666)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of treasury stock			(894)		894
Stock-based compensation	304		304
Net share settlement related to restricted stock vesting	(70)		(70)
Net income	2,544			2,544
Forfeited restricted stock (in shares)		(76,000)
Forfeited restricted stock		$ (1)	1
Balance (in shares) at Jun. 30, 2018		12,015,000
Balance at Jun. 30, 2018	70,125	$ 120	65,738	69,039	(64,772)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Correction of error	78,467					$ 803	$ 803	$ 77,664
Balance, as adjusted	81,273	$ 120	66,433	78,467	(63,747)
Balance (in shares) at Dec. 31, 2018		12,012,000							12,012,000
Balance at Dec. 31, 2018	81,273							80,470	$ 120	$ 66,433	$ 77,664	$ (63,747)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of treasury stock			(4,558)		4,558
Stock-based compensation	589		589
Net share settlement related to restricted stock vesting (in shares)		(5,000)
Net share settlement related to restricted stock vesting	(72)		(72)
Net income	1,501			1,501
Balance (in shares) at Mar. 31, 2019		12,007,000
Balance at Mar. 31, 2019	83,291	$ 120	62,392	79,968	(59,189)
Balance (in shares) at Dec. 31, 2018		12,012,000							12,012,000
Balance at Dec. 31, 2018	81,273							$ 80,470	$ 120	$ 66,433	$ 77,664	$ (63,747)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,502
Balance (in shares) at Jun. 30, 2019		11,989,000
Balance at Jun. 30, 2019	83,996	$ 120	62,718	79,969	(58,811)
Balance (in shares) at Mar. 31, 2019		12,007,000
Balance at Mar. 31, 2019	83,291	$ 120	62,392	79,968	(59,189)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of treasury stock			(378)		378
Stock-based compensation	705		705
Net share settlement related to restricted stock vesting	(1)		(1)
Net income	1			1
Forfeited restricted stock (in shares)		(18,000)
Balance (in shares) at Jun. 30, 2019		11,989,000
Balance at Jun. 30, 2019	83,996	$ 120	$ 62,718	$ 79,969	$ (58,811)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Correction of error	$ 79,969