Note 6 - Revenue From Contracts With Customers (Tables)

6 Months Ended

Jul. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended July 31,				Six Months Ended July 31,
	2023		2022		2023		2022
Revenue recognized at a point in time:	(in thousands)
Seamap	$	7,103	$	4,288	$	17,508	$	12,281
Klein		1,180		3,688		2,652		4,696
Total revenue recognized at a point in time	$	8,283	$	7,976	$	20,160	$	16,977
Revenue recognized over time:
Seamap	$	458	$	737	$	650	$	823
Klein	$	9	$	—	$	526	$	—
Total revenue recognized over time		467		737		1,176		823
Total revenue from contracts with customers	$	8,750	$	8,713	$	21,336	$	17,800

	Three Months Ended July 31,				Six Months Ended July 31,
	2023		2022		2023		2022
	(in thousands)
United States	$	378	$	2,333	$	1,720	$	4,586
Europe		2,965		4,082		10,000		8,694
Asia-Pacific		4,700		2,042		8,653		4,226
Other		707		256		963		294
Total revenue from contracts with customers	$	8,750	$	8,713	$	21,336	$	17,800

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

	July 31, 2023		January 31, 2023
Contract Assets:	(in thousands)
Unbilled revenue - current	$	33	$	2
Total unbilled revenue	$	33	$	2
Contract Liabilities:
Deferred revenue & customer deposits - current	$	1,670	$	571
Total deferred revenue & customer deposits	$	1,670	$	571