Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2017	$ 102	$ (1)	$ 10,808	$ 45,457	$ (908)	$ 611	$ 56,069
Balance, shares at Dec. 31, 2017	10,091,822
Net Income				$ 8,939		$ 76	$ 9,015
Cumulative Translation Adjustment					65	2	67
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards, shares
Dividends Declared				$ (4,642)		$ (491)	$ (5,133)
Balance at Jun. 30, 2018	$ 102	$ (1)	$ 10,808	$ 49,754	$ (843)	$ 198	$ 60,018
Balance, shares at Jun. 30, 2018	10,091,822
Balance at Mar. 31, 2018	$ 102	$ (1)	$ 10,808	$ 49,620	$ (501)	$ 674	$ 60,702
Balance, shares at Mar. 31, 2018	10,091,822
Net Income				$ 4,776		$ 36	$ 4,812
Cumulative Translation Adjustment					(342)	(21)	(363)
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards, shares
Dividends Declared				$ (4,642)		$ (491)	$ (5,133)
Balance at Jun. 30, 2018	$ 102	$ (1)	$ 10,808	$ 49,754	$ (843)	$ 198	$ 60,018
Balance, shares at Jun. 30, 2018	10,091,822
Balance at Dec. 31, 2018	$ 102	$ (1)	$ 10,808	$ 56,110	$ (950)	$ 252	$ 66,321
Balance, shares at Dec. 31, 2018	10,091,822
Net Income				$ 8,365		$ 88	$ 8,453
Cumulative Translation Adjustment					(52)	(3)	(55)
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards			$ 217				$ 217
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards, shares	2,500
Dividends Declared				$ (5,248)			$ (5,248)
Balance at Jun. 30, 2019	$ 102	$ (1)	$ 11,025	$ 59,227	$ (1,002)	$ 337	$ 69,688
Balance, shares at Jun. 30, 2019	10,094,322
Balance at Mar. 31, 2019	$ 102	$ (1)	$ 10,808	$ 60,492	$ (868)	$ 307	$ 70,840
Balance, shares at Mar. 31, 2019	10,091,822
Net Income				$ 3,983		$ 39	$ 4,022
Cumulative Translation Adjustment					(134)	(9)	(143)
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards			$ 217				$ 217
Shares Reissued From Treasury Pursuant To Restricted Stock Unit Awards, shares	2,500
Dividends Declared				$ (5,248)			$ (5,248)
Balance at Jun. 30, 2019	$ 102	$ (1)	$ 11,025	$ 59,227	$ (1,002)	$ 337	$ 69,688
Balance, shares at Jun. 30, 2019	10,094,322