Schedule II - Schedule of Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Allowance for Bad Debt [Member]
Balance at beginning of period	$ 396	$ 1,090	$ 1,242
Charged to statements of income	144	98	40
Write-offs, net of recoveries	(31)	(834)	(184)
Impact of foreign currency translation	22	42	(8)
Balance at end of period	487	396	1,090
Impact of foreign currency translation	(22)	(42)	8
Allowance for Returns [Member]
Balance at beginning of period	1,367	1,115	1,400
Charged to statements of income	1,608	923	197
Write-offs, net of recoveries	(518)	(733)	(472)
Impact of foreign currency translation	43	62	(10)
Balance at end of period	2,414	1,367	1,115
Impact of foreign currency translation	(43)	(62)	10
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance at beginning of period	1,763	2,205	2,642
Charged to statements of income	1,752	1,021	237
Write-offs, net of recoveries	(549)	(1,567)	(656)
Impact of foreign currency translation	65	104	(18)
Balance at end of period	2,901	1,763	2,205
Impact of foreign currency translation	$ (65)	$ (104)	$ 18