Note 4 - Fair Value Measurements (Tables)

9 Months Ended

Oct. 31, 2019

Notes Tables

Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]

	Fair value measurement at reporting date using
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	(in thousands)
Money market mutual funds as of October 31, 2019	$	107,905
Money market mutual funds as of January 31, 2019	$	107,855
Short-term investments as of October 31, 2019	$	-
Short-term investments as of January 31, 2019	$	1,200
Liability related to the interest rate swap as of October 31, 2019			$	(216	)
Asset related to the interest rate swap as of January 31, 2019			$	136

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

	Liability / Asset
		Fair Value
	Balance Sheet Location	October 31, 2019			January 31, 2019
Derivative instrument:
Interest rate swap	(Other liabilities) / Other assets, net	$	(216	)	$	136
Total		$	(216	)	$	136