Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Income Tax Expense (Benefit)	$ 620	$ (1,073)
Effective Income Tax Rate Reconciliation, Percent	32.00%	28.00%
Unrecognized Tax Benefits	$ 1,800
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
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 300