Note 3 - Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2020

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)
As of January 31, 2020
Money market mutual funds	$	107,319
Certificates of deposit	$	14,917
Liability related to the interest rate swap			$	(232	)

As of January 31, 2019
Money market mutual funds	$	105,205
Certificates of deposit	$	11,578
Short-term investments	$	1,200
Asset related to the interest rate swap			$	136

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

	(Liability) Asset
			Fair Value
	Balance Sheet Location		January 31, 2020			January 31, 2019
Derivative instrument:
Interest rate swap		Other (liabilities) assets, net	$	(232	)	$	136
Total			$	(232	)		136

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

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