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Acquisition - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016
Business Acquisition [Line Items] |  |
Purchase price of the acquisition |  | $ 7,360,000
Fair value assumptions, Weighted average cost of capital | 15.50% |
Fair value key assumptions | Key assumptions include (1) a weighted average cost of capital of 15.5%; (2) a range of earnings projections from $0.1-$0.7 million and (3) a range of contract renewal probability from 30%-100%. |
Minimum [Member] |  |
Business Acquisition [Line Items] |  |
Fair value assumptions, Earnings projections | $ 100,000 |
Fair value assumptions, Contract renewal probability | 30.00% |
Maximum [Member] |  |
Business Acquisition [Line Items] |  |
Fair value assumptions, Earnings projections | $ 700,000 |
Fair value assumptions, Contract renewal probability | 100.00% |
RITEC [Member] |  |
Business Acquisition [Line Items] |  |
Completion date of acquisition | Jun. 19, 2015 |
Date of asset purchase agreement | Jun. 18, 2015 |
Purchase price of the acquisition | $ 7,400,000 |
Amount withheld in escrow related to business acquisition | $ 800,000 |
Duration of escrow deposits | 12 months |
Escrow amount retained | $ 100,000 |
General and administrative expenses |  | $ 100,000
Estimated inventory purchase | $ 200,000 |
Percentage of royalties on sale price of products | 7.50% |
Initial royalty payment period | 5 years |
Royalty revenue accrued | $ 0 |
Goodwill deductible for tax purposes | $ 3,500,000 |

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- Definition Cash held in escrow in regards to purchase of business to protect acquirer in case it is determined that there was some breach of representation or warranty. + References No definition available. + Details
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- Definition Amount of anticipated inventory to be purchased at the end of the transition services agreement. + References No definition available. + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e1043-128460 + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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