Note 5 - Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Jan. 31, 2017
Goodwill, Impairment Loss					$ 0
Write off of Amortizable Intangible Assets			$ 1,600,000
Amortization of Intangible Assets	$ 85,000	$ 165,000	359,000	$ 496,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 56,000		$ 56,000