CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning balance at Dec. 31, 2013	$ 111	$ 27,674	$ 27,326	$ (22,527)	$ (63)	$ 32,521
Beginning balance (in shares) at Dec. 31, 2013	8,319,316
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares from exercise of stock options	$ 0	13	0	0	0	13
Issuance of shares from exercise of stock options (in shares)	6,000
Issuance of deferred stock units	$ 0	100	0	0	0	100
Issuance of common stock on deferred stock units, net of relinquishments	$ 0	(44)	0	0	0	(44)
Issuance of common stock on deferred stock units, net of relinquishments (in shares)	9,939
Tax benefit (shortfall) related to employee stock sales	$ 0	7	0	0	0	7
Purchase of treasury stock	$ 0	0	0	(2,634)	0	(2,634)
Purchase of treasury stock (in shares)	(434,998)
Dividends declared and paid on common stock	$ 0	0	(2,556)	0	0	(2,556)
Share-based compensation expense	0	506	0	0	0	506
Reversal of deferred tax asset in connection with stock options forfeited	0	(89)	0	0	0	(89)
Foreign currency translation adjustment, net of tax	0	0	0	0	(9)	(9)
Net income (loss)	0	0	(2,421)	0	0	(2,421)
Ending balance at Dec. 31, 2014	$ 111	28,167	22,349	(25,161)	(72)	25,394
Ending balance (in shares) at Dec. 31, 2014	7,900,257
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares from exercise of stock options	$ 1	262	0	0	0	263
Issuance of shares from exercise of stock options (in shares)	34,600
Issuance of deferred stock units	$ 0	160	0	0	0	160
Issuance of common stock on deferred stock units, net of relinquishments	$ 0	(39)	0	0	0	(39)
Issuance of common stock on deferred stock units, net of relinquishments (in shares)	13,988
Tax benefit (shortfall) related to employee stock sales	$ 0	(48)	0	0	0	(48)
Purchase of treasury stock	$ 0	0	0	(1,020)	0	(1,020)
Purchase of treasury stock (in shares)	(166,553)
Dividends declared and paid on common stock	$ 0	0	(2,485)	0	0	(2,485)
Share-based compensation expense	0	488	0	0	0	488
Reversal of deferred tax asset in connection with stock options forfeited	0	(69)	0	0	0	(69)
Foreign currency translation adjustment, net of tax	0	0	0	0	(8)	(8)
Net income (loss)	0	0	3,092	0	0	3,092
Ending balance at Dec. 31, 2015	$ 112	28,921	22,956	(26,181)	(80)	$ 25,728
Ending balance (in shares) at Dec. 31, 2015	7,782,292					11,170,881
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares from exercise of stock options	$ 0	23	0	0	0	$ 23
Issuance of shares from exercise of stock options (in shares)	3,750
Issuance of deferred stock units	$ 0	202	0	0	0	202
Issuance of common stock on deferred stock units, net of relinquishments	$ 0	(51)	0	0	0	(51)
Issuance of common stock on deferred stock units, net of relinquishments (in shares)	10,700
Tax benefit (shortfall) related to employee stock sales	$ 0	1	0	0	0	1
Purchase of treasury stock	$ 0	0	0	(3,571)	0	(3,571)
Purchase of treasury stock (in shares)	(463,378)
Dividends declared and paid on common stock	$ 0	0	(2,416)	0	0	(2,416)
Share-based compensation expense	0	611	0	0	0	611
Reversal of deferred tax asset in connection with stock options forfeited	0	(6)	0	0	0	(6)
Foreign currency translation adjustment, net of tax	0	0	0	0	(29)	(29)
Net income (loss)	0	0	3,617	0	0	3,617
Ending balance at Dec. 31, 2016	$ 112	$ 29,701	$ 24,157	$ (29,752)	$ (109)	$ 24,109
Ending balance (in shares) at Dec. 31, 2016	7,333,364					11,185,331