Note 3 - Fair Value Measurements (Details Textual) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Feb. 01, 2018	Jan. 31, 2016
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 139,413,000	$ 147,023,000	$ 145,082,000	$ 147,023,000	$ 137,731,000
Interest Rate Swap [Member]
Derivative, Gain (Loss) on Derivative, Net, Total	51,000	377,000	$ 485,000
Reported Value Measurement [Member]
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 31,600,000	$ 32,000,000