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, 2018	$ 120	66,433	78,467	(63,747)	81,273
Balance (in shares) at Dec. 31, 2018	12,012
Increase (Decrease) in Stockholders' Equity
Net income (loss)					129
Balance at Sep. 30, 2019	$ 120	62,585	78,596	(58,790)	82,511
Balance (in shares) at Sep. 30, 2019	11,988
Balance at Mar. 31, 2019	$ 120	62,392	79,968	(59,189)	83,291
Balance (in shares) at Mar. 31, 2019	12,007
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock		(378)		378
Stock-based compensation		705			705
Forfeited restricted stock (in shares)	(18)
Net share settlement related to restricted stock vesting		(1)			(1)
Net income (loss)			1		1
Balance at Jun. 30, 2019	$ 120	62,718	79,969	(58,811)	83,996
Balance (in shares) at Jun. 30, 2019	11,989
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock		(21)		21
Stock-based compensation		(107)			(107)
Net share settlement related to restricted stock vesting		(5)			(5)
Net share settlement related to restricted stock vesting (in shares)	(1)
Net income (loss)			(1,373)		(1,373)
Balance at Sep. 30, 2019	$ 120	62,585	78,596	(58,790)	82,511
Balance (in shares) at Sep. 30, 2019	11,988
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
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
Net income (loss)					(1,187)
Balance at Sep. 30, 2020	$ 120	60,006	72,582	(54,506)	78,202
Balance (in shares) at Sep. 30, 2020	12,038
Balance at Mar. 31, 2020	$ 120	59,325	71,218	(54,589)	76,074
Balance (in shares) at Mar. 31, 2020	11,962
Increase (Decrease) in Stockholders' Equity
Issuance of treasury stock		(123)		123
Stock-based compensation		363			363
Restricted stock award grant (in shares)	74
Net income (loss)			(931)		(931)
Balance at Jun. 30, 2020	$ 120	59,565	70,287	(54,466)	75,506
Balance (in shares) at Jun. 30, 2020	12,036
Increase (Decrease) in Stockholders' Equity
Return of treasury stock		40		(40)
Stock-based compensation		406			406
Restricted stock award grant (in shares)	3
Forfeited restricted stock (in shares)	(1)
Net share settlement related to restricted stock vesting		(5)			(5)
Net income (loss)			2,295		2,295
Balance at Sep. 30, 2020	$ 120	$ 60,006	$ 72,582	$ (54,506)	$ 78,202
Balance (in shares) at Sep. 30, 2020	12,038