Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2016	Oct. 31, 2015
Income Tax Expense (Benefit)	$ 1,155	$ 729	$ (493)	$ 1,935
Effective Income Tax Rate Reconciliation, Percent	43.00%	22.00%	63.00%	29.00%
Unrecognized Tax Benefits	$ 1,400		$ 1,400
Unrecognized Tax Benefits, Period Increase (Decrease)			(1,000)
Increase (Decrease) in Deferred Tax Asset			(1,000)
Unrecognized Tax Benefits Recognized in Next Twelve Months	100		100
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 200		$ 200