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Note 17 - Income Taxes (Details) - Components of Deferred Income Tax Assets and Liabilities - USD ($)
$ in Thousands
Jan. 31, 2016
Jan. 31, 2015
Assets    
Accruals not currently deductible $ 8,653 $ 4,238
Accumulated net operating losses 19,859 22,617
Corporate minimum taxes 1,589 1,710
Difference between tax and accounting basis of property and equipment 700 7,031
Research and development and other tax credits and expenses 2,885 2,792
Other timing differences 924 1,508
Total deferred income tax assets 34,610 39,896
Liabilities    
Difference between tax and accounting basis of intangible assets (9,584) (9,232)
Uncertain tax positions incurred in loss years (356) (530)
Total deferred income tax liabilities (9,940) (9,762)
Net deferred income taxes 24,670 30,134
Valuation allowance (13,963) (14,681)
Net deferred income taxes, net of valuation allowance $ 10,707 $ 15,453