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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2017 | Jul. 31, 2016 | Jul. 31, 2017 | Jul. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 23,909 | $ 22,269 | $ 46,870 | $ 42,638
Domestic [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 12,630 | $ 11,790 | $ 25,330 | $ 23,980
Sales Revenue, Percentage | 52.83% | 52.94% | 54.05% | 56.24%
International [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 11,280 | $ 10,480 | $ 21,540 | $ 18,660
Sales Revenue, Percentage | 47.17% | 47.06% | 45.95% | 43.76%
Sales Revenue, Net [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 23,910 | $ 22,270 | $ 46,870 | $ 42,640
Sales Revenue, Percentage | 100.00% | 100.00% | 100.00% | 100.00%

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