CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY - 9 months ended Sep. 30, 2017 - USD ($)	Total	Common Class A [Member]	Additional paid-in capital [Member]	Retained earnings [Member]	Treasury stock [Member]	Accumulated other comprehensive loss [Member]
Balance at Dec. 31, 2016	$ 47,590,000	$ 4,181,000	$ 12,906,000	$ 36,061,000	$ (4,821,000)	$ (737,000)
Balance (in shares) at Dec. 31, 2016		4,181,000			(584,000)
Net loss	(38,000)	$ 0	0	(38,000)	$ 0	0
Restricted common stock compensation	30,000	$ 5,000	25,000	0	$ 0	0
Restricted common stock compensation (in shares)		5,000			0
Stock - based compensation	20,000	$ 0	20,000	0	$ 0	0
Exercise of stock options	62,000	$ 17,000	45,000	0	$ 0	0
Exercise of stock options (in shares)		17,000			0
Dividends	(542,000)	$ 0	0	(542,000)	$ 0	0
Purchase of Treasury stock	(89,000)	$ 0	0	0	$ (89,000)	0
Purchase of Treasury stock (in shares)		0			(12,000)
Foreign currency translation adjustment	188,000	$ 0	0	0	$ 0	188,000
Balance at Sep. 30, 2017	$ 47,221,000	$ 4,203,000	$ 12,996,000	$ 35,481,000	$ (4,910,000)	$ (549,000)
Balance (in shares) at Sep. 30, 2017		4,203,000			(596,000)