Inventories - Schedule of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 6,718us-gaap_InventoryRawMaterials	$ 4,599us-gaap_InventoryRawMaterials
Finished goods	4,466us-gaap_InventoryFinishedGoods	4,159us-gaap_InventoryFinishedGoods
Work in progress	1,017us-gaap_InventoryWorkInProcess	612us-gaap_InventoryWorkInProcess
Cost of inventories	12,201us-gaap_InventoryGross	9,370us-gaap_InventoryGross
Less allowance for obsolescence	(750)us-gaap_InventoryValuationReserves	(1,032)us-gaap_InventoryValuationReserves
Net inventories	$ 11,451us-gaap_InventoryNet	$ 8,338us-gaap_InventoryNet

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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-Name Regulation S-X (SX)

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