Note 5 - Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Goodwill, Impairment Loss					$ 0
Write off of Amortizable Intangible Assets	$ 1,500,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	142,000		$ 142,000
Amortization of Intangible Assets	$ 111,000	$ 166,000	$ 274,000	$ 331,000