Note 5 - Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Jan. 31, 2017
Goodwill, Impairment Loss			$ 0
Amortization of Intangible Assets	$ 163,000	$ 165,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 253,000