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Segment Reporting (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2017 | Oct. 31, 2016 | Oct. 31, 2017 | Oct. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 23,960 | $ 23,243 | $ 70,831 | $ 65,881
Domestic [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 12,850 | $ 11,260 | $ 38,180 | $ 35,240
Sales Revenue, Percentage | 53.64% | 48.45% | 53.91% | 53.49%
International [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 11,110 | $ 11,980 | $ 32,650 | $ 30,640
Sales Revenue, Percentage | 46.36% | 51.55% | 46.09% | 46.51%
Sales Revenue, Net [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 23,960 | $ 23,240 | $ 70,830 | $ 65,880
Sales Revenue, Percentage | 100.00% | 100.00% | 100.00% | 100.00%

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