Note 3 - Fair Value Measurements (Details Textual) - USD ($)	6 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Reported Value Measurement [Member]
Cash and Cash Equivalents, at Carrying Value	$ 23,000,000		$ 24,000,000
Interest Rate Swap [Member]
Derivative, Gain (Loss) on Derivative, Net	(212,000)	$ 351,000
Cash and Cash Equivalents, at Carrying Value	$ 134,708,000	$ 130,085,000	$ 137,731,000	$ 120,526,000