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Acquisition - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Oct. 31, 2015
USD ($)
Oct. 31, 2015
USD ($)
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 $110,000-$700,000 and (3) a range of contract renewal probability from 0%-100%.
Minimum [Member]    
Business Acquisition [Line Items]    
Fair value assumptions, Earnings projections   $ 110,000
Fair value assumptions, Contract renewal probability   0.00%
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   $ 7,360,000
Amount held in escrow related to business acquisition $ 750,000 $ 750,000
Duration of escrow deposits   12 months
General and administrative expenses 18,000 $ 107,000
Estimated inventory purchase 100,000 $ 100,000
Percentage of royalties on sale price of products   7.50%
Initial royalty payment period   5 years
Goodwill deductible for tax purposes $ 3,530,000 $ 3,530,000