Income Taxes - Company's Deferred Taxes (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015
Deferred tax assets:
Net operating losses	$ 10,127	$ 4,053
Tax credit carry forwards	823	4,472
Stock option book expense	2,716	2,837
Allowance for doubtful accounts	2,121	1,798
Allowance for inventory obsolescence	116	68
Accruals not yet deductible for tax purposes	636	421
Fixed assets	299
Other	627	620
Gross deferred tax assets	17,465	14,269
Valuation allowance	(16,647)	(1,379)
Deferred tax assets	818	12,890
Deferred tax liabilities:
Fixed assets		(636)
Intangible assets	(215)	(390)
Foreign branch taxes		(274)
Other	(17)	(4)
Deferred tax liabilities	(232)	(1,304)
Unrecognized tax benefits		(237)
Total deferred tax assets, net	$ 586	$ 11,349