CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (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, 2012	$ 35,088,000	$ 4,013,000	$ 11,384,000	$ 22,646,000	$ (2,955,000)	$ 0
Balance (in shares) at Dec. 31, 2012		4,013,000			(342,000)
Net income	3,225,000	0	0	3,225,000	0	0
Exercise of stock options	62,000	22,000	62,000	0	(22,000)	0
Exercise of stock options (in shares)		22,000			(2,000)
Issuance of restricted common stock	17,000	3,000	14,000	0	0	0
Issuance of restricted common stock (in shares)		3,000
Stock-based compensation	338,000	0	338,000	0	0	0
Foreign currency translation adjustment	0
Balance at Dec. 31, 2013	38,730,000	4,038,000	11,798,000	25,871,000	(2,977,000)	0
Balance (in shares) at Dec. 31, 2013		4,038,000			(344,000)
Net income	2,080,000	0	0	2,080,000	0	0
Exercise of stock options	745,000	98,000	653,000	0	(6,000)	0
Exercise of stock options (in shares)		98,000			(1,000)
Purchase of common stock	(1,583,000)	0	0	0	(1,583,000)	0
Purchase of common stock (in shares)					(209,000)
Issuance of restricted common stock	27,000	3,000	24,000	0	0	0
Issuance of restricted common stock (in shares)		3,000
Stock-based compensation	220,000	0	220,000	0	0	0
Foreign currency translation adjustment	(228,000)	0	0	0	0	(228,000)
Balance at Dec. 31, 2014	$ 39,991,000	$ 4,139,000	$ 12,695,000	$ 27,951,000	$ (4,566,000)	$ (228,000)
Balance (in shares) at Dec. 31, 2014		4,139,000			(554,000)