Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Jan. 31, 2014	$ 66,614	$ 465	$ 41,235	$ 37,201	$ (12,463)	$ 176
Beginning Balance, Shares at Jan. 31, 2014		9,291,225
Share-based compensation	511		511
Employee option exercises	$ 1,009	$ 11	1,887		(889)
Employee option exercises, Shares	224,275	227,512
Tax benefit of employee stock options	$ 107		107
Restricted stock awards vested, net	(139)	$ 1	(140)
Restricted stock awards vested, net, Shares		26,127
Repurchases of common stock	(6,250)				(6,250)
Dividends paid	(2,128)			(2,128)
Net Income	4,662			4,662
Other comprehensive loss	(875)					(875)
Ending Balance at Jan. 31, 2015	63,511	$ 477	43,600	39,735	(19,602)	(699)
Ending Balance, Shares at Jan. 31, 2015		9,544,864
Share-based compensation	1,209		1,209
Employee option exercises	$ 436	$ 5	802		(371)
Employee option exercises, Shares	93,344	98,734
Tax benefit of employee stock options	$ 65		65
Restricted stock awards vested, net	(49)	$ 1	(1)		(49)
Restricted stock awards vested, net, Shares		22,692
Dividends paid	(2,048)			(2,048)
Net Income	4,525			4,525
Other comprehensive loss	(276)					(276)
Ending Balance at Jan. 31, 2016	67,373	$ 483	45,675	42,212	(20,022)	(975)
Ending Balance, Shares at Jan. 31, 2016		9,666,290
Share-based compensation	1,019		1,019
Employee option exercises	$ 388	$ 5	834		(451)
Employee option exercises, Shares	87,107	93,483
Restricted stock awards vested, net	$ (308)	$ 4	(4)		(308)
Restricted stock awards vested, net, Shares		75,133
Dividends paid	(2,082)			(2,082)
Net Income	4,228			4,228
Other comprehensive loss	(81)					(81)
Ending Balance at Jan. 31, 2017	$ 70,537	$ 492	$ 47,524	$ 44,358	$ (20,781)	$ (1,056)
Ending Balance, Shares at Jan. 31, 2017		9,834,906