Consolidated Statements of Changes in Shareholders Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balances at Jan. 31, 2012	$ 155,434	$ 136	$ 113,654	$ (4,857)	$ 39,297	$ 7,204
Beginning balances, shares at Jan. 31, 2012		13,556,000
Net income (loss)	17,051				17,051
Foreign currency translation	977					977
Issuance of common stock upon exercise of options	332	2	330
Issuance of common stock upon exercise of options, shares		158,000
Restricted stock issued	516		516
Restricted stock issued, shares		49,000
Restricted stock forfeited for taxes	(3)			(3)
Tax expense (benefit) from exercise of stock options and vesting of restricted stock	420		420
Stock-based compensation	1,586		1,586
Ending balances at Jan. 31, 2013	176,313	138	116,506	(4,860)	56,348	8,181
Ending balances, shares at Jan. 31, 2013		13,763,000
Net income (loss)	4,768				4,768
Foreign currency translation	(10,069)					(10,069)
Issuance of common stock upon exercise of options	513	1	512
Issuance of common stock upon exercise of options, shares		91,000
Restricted stock issued, shares		53,000
Restricted stock forfeited for taxes	(15)			(15)
Tax expense (benefit) from exercise of stock options and vesting of restricted stock	(5)		(5)
Purchase of common stock	(2,200)			(2,200)
Purchase of common stock , shares	147,900
Stock-based compensation	1,143		1,143
Ending balances at Jan. 31, 2014	170,448	139	118,156	(7,075)	61,116	(1,888)
Ending balances, shares at Jan. 31, 2014		13,907,000
Net income (loss)	(9,192)				(9,192)
Foreign currency translation	(6,638)					(6,638)
Issuance of common stock upon exercise of options	334	1	333
Issuance of common stock upon exercise of options, shares	65,000	65,000
Restricted stock issued, shares		40,000
Restricted stock forfeited for taxes	(14)			(14)
Purchase of common stock	(9,762)			(9,762)
Purchase of common stock , shares	852,100	0
Stock-based compensation	1,298		1,298
Ending balances at Jan. 31, 2015	$ 146,474	$ 140	$ 119,787	$ (16,851)	$ 51,924	$ (8,526)
Ending balances, shares at Jan. 31, 2015		14,012,000