SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Allowance for Bad Debt [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	$ 1,221	$ 1,474	$ 1,283
Charged to Statements of Income	86	72	324
Write-Offs, Net of Recoveries	(39)	(313)	(131)
Impact of Foreign Currency Translation	(74)	(12)	(2)
Balance at End of Period	1,194	1,221	1,474
Allowance for Sales Returns [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	1,229	1,036	1,184
Charged to Statements of Income	768	982	413
Write-Offs, Net of Recoveries	(574)	(729)	(548)
Impact of Foreign Currency Translation	(93)	(60)	(13)
Balance at End of Period	1,330	1,229	1,036
Total Allowance for Doubtful Accounts [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at Beginning of Period	2,450	2,510	2,467
Charged to Statements of Income	854	1,054	737
Write-Offs, Net of Recoveries	(613)	(1,042)	(679)
Impact of Foreign Currency Translation	(167)	(72)	(15)
Balance at End of Period	$ 2,524	$ 2,450	$ 2,510