Note 5 - Revenue From Contracts With Customers (Tables)

3 Months Ended

Apr. 30, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended April 30,
	2023		2022
Revenue recognized at a point in time:	(in thousands)
Seamap	$	10,405	$	7,994
Klein		1,472		1,008
Total revenue recognized at a point in time	$	11,877	$	9,002
Revenue recognized over time:
Seamap	$	192	$	85
Klein	$	517	$	—
Total revenue recognized over time		709		85
Total revenue from contracts with customers	$	12,586	$	9,087

	Three Months Ended April 30,
	2023		2022
	(in thousands)
United States	$	1,342	$	2,253
Europe		7,035		4,612
Asia-Pacific		3,953		2,184
Other		256		38
Total revenue from contracts with customers	$	12,586	$	9,087

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	April 30, 2023		January 31, 2023
Contract Assets:	(in thousands)
Unbilled revenue - current	$	13	$	2
Total unbilled revenue	$	13	$	2
Contract Liabilities:
Deferred revenue & customer deposits - current	$	1,178	$	571
Total deferred revenue & customer deposits	$	1,178	$	571