SCHEDULE II SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Allowance for Bad Debt [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at beginning of period	$ 1,194	$ 1,221	$ 1,474
Charged to statements of income	78	86	72
Write-offs, net of recoveries	(5)	(39)	(313)
Impact of foreign currency translation	(25)	(74)	(12)
Balance at end of period	1,242	1,194	1,221
Allowance for Sales Returns [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at beginning of period	1,330	1,229	1,036
Charged to statements of income	696	768	982
Write-offs, net of recoveries	(555)	(574)	(729)
Impact of foreign currency translation	(71)	(93)	(60)
Balance at end of period	1,400	1,330	1,229
Total Allowance for Doubtful Accounts [Member]
Movement In Valuation Allowances And Reserves [Rollforward]
Balance at beginning of period	2,524	2,450	2,510
Charged to statements of income	774	854	1,054
Write-offs, net of recoveries	(560)	(613)	(1,042)
Impact of foreign currency translation	(96)	(167)	(72)
Balance at end of period	$ 2,642	$ 2,524	$ 2,450