Note 3 - Income Taxes - Open Tax Years (Details)	12 Months Ended
	Jan. 31, 2018
U.S. Federal [Member]
Open tax years	FY15 and beyond
California [Member]
Open tax years	FY14 and beyond
Michigan [Member]
Open tax years	FY14 and beyond
New Jersey [Member]
Open tax years	FY14 and beyond
Australia [Member]
Open tax years	FY14 and beyond
France [Member]
Open tax years	FY15 and beyond
India [Member]
Open tax years	FY10, FY11, FY13, and FY14
Ireland [Member]
Open tax years	FY14 and beyond
United Kingdom [Member]
Open tax years	FY17 and beyond