Schedule II - Schedule of Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Allowance for Bad Debt [Member]
Balance at beginning of period	$ 1,242	$ 1,194	$ 1,221
Charged to statements of income	40	78	86
Write-offs, net of recoveries	(184)	(5)	(39)
Impact of foreign currency translation	(8)	(25)	(74)
Balance at end of period	1,090	1,242	1,194
Allowance for Sales Returns [Member]
Balance at beginning of period	1,400	1,330	1,229
Charged to statements of income	197	696	768
Write-offs, net of recoveries	(472)	(555)	(574)
Impact of foreign currency translation	(10)	(71)	(93)
Balance at end of period	1,115	1,400	1,330
Allowance for Doubtful Accounts [Member]
Balance at beginning of period	2,642	2,524	2,450
Charged to statements of income	237	774	854
Write-offs, net of recoveries	(656)	(560)	(613)
Impact of foreign currency translation	(18)	(96)	(167)
Balance at end of period	$ 2,205	$ 2,642	$ 2,524