Note 4 - Fair Value Measurements (Tables)

3 Months Ended

Apr. 30, 2018

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 April 30, 2018 (a)	$	108,892
Money market mutual funds as of January 31, 2018 (a)	$	115,416
Asset related to the interest rate swap as of April 30, 2018 (b)			$	304
Asset related to the interest rate swap as of January 31, 2018 (b)			$	187

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

	Asset
		Fair Value
	Balance Sheet Location	April 30, 2018		January 31, 2018
Derivative instrument:
Interest rate swap	Other assets, net	$	304	$	187
Total		$	304	$	187

- 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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