Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Common Stock Shares Outstanding, Net of Shares of Treasury Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance at Dec. 31, 2017	$ 14	$ 58,034	$ 20,902	$ (78)	$ (47,025)	$ 31,847
Balance, shares at Dec. 31, 2017	11,129,892
Proceeds from options exercised		$ 338				$ 338
Proceeds from options exercised, shares	240,000
Cashless options exercise
Cashless options exercise, shares	164,679
Cash dividends			$ (11,700)			$ (11,700)
Unrealized gain on marketable securities				54		54
Share-based compensation		433				433
Share-based compensation, shares	7,474
Net loss			(1,273)			(1,273)
Balance at Sep. 30, 2018	$ 14	$ 58,805	$ 7,929	$ (24)	$ (47,025)	$ 19,699
Balance, shares at Sep. 30, 2018	11,542,045