Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2018	20,058,904
Balance at Dec. 31, 2018	$ 201	$ 193,132	$ 46,621	$ 239,954	$ 76	$ 240,030
Net loss	0	0	(1,987)	(1,987)	0	(1,987)
Stock-based compensation expense	$ 0	566	0	566	0	566
Shares net settled with the Company to satisfy employee personal income tax liabilities resulting from share based compensation plans (in shares)	(85,420)
Shares net settled with the Company to satisfy employee personal income tax liabilities resulting from share based compensation plans	$ 0	(488)	0	(488)	0	(488)
Shares issued through stock plans (in shares)	229,545
Shares issued through stock plans	$ 1	(1)	0	0	0	$ 0
Repurchase of common stock (in shares)	(153,916)					(153,916)
Repurchase of common stock	$ (2)	(1,040)	0	(1,042)	0	$ (1,042)
Balance (in shares) at Mar. 31, 2019	20,049,113
Balance at Mar. 31, 2019	$ 200	192,169	44,634	237,003	76	$ 237,079
Balance (in shares) at Dec. 31, 2019	20,096,969					20,096,969
Balance at Dec. 31, 2019	$ 201	193,862	38,584	232,647	112	$ 232,759
Net loss	0	0	(8,476)	(8,476)	0	(8,476)
Stock-based compensation expense	$ 0	589	0	589	0	589
Shares net settled with the Company to satisfy employee personal income tax liabilities resulting from share based compensation plans (in shares)	(58,098)
Shares net settled with the Company to satisfy employee personal income tax liabilities resulting from share based compensation plans	$ 0	(303)	0	(303)	0	(303)
Shares issued through stock plans (in shares)	152,177
Shares issued through stock plans	$ 1	(1)	0	0	0	$ 0
Repurchase of common stock (in shares)	(1,233,883)					(1,233,883)
Repurchase of common stock	$ (12)	(2,221)	0	(2,233)	0	$ (2,233)
Balance (in shares) at Mar. 31, 2020	18,957,165					18,957,165
Balance at Mar. 31, 2020	$ 190	$ 191,926	$ 30,108	$ 222,224	$ 112	$ 222,336