Note 3 - Fair Value Measurements (Details Textual) - USD ($)	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Reported Value Measurement [Member]
Cash and Cash Equivalents, at Carrying Value	$ 25,000,000		$ 24,000,000
Interest Rate Swap [Member]
Derivative, Gain (Loss) on Derivative, Net	31,000	$ 164,000
Cash and Cash Equivalents, at Carrying Value	$ 135,689,000	$ 126,621,000	$ 137,731,000	$ 120,526,000