Note 5 - Revenue From Contracts With Customers (Tables)

6 Months Ended

Jul. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended July 31,				Six Months Ended July 31,
	2022		2021		2022		2021
Revenue recognized at a point in time:	(in thousands)
Seamap	$	4,288	$	5,256	$	12,281	$	8,169
Klein		3,688		1,406		4,696		2,556
Total revenue recognized at a point in time	$	7,976	$	6,662	$	16,977	$	10,725
Revenue recognized over time:
Seamap	$	737	$	145	$	823	$	276
Klein	$	—	$	—	$	—	$	—
Total revenue recognized over time		737		145		823		276
Total revenue from contracts with customers	$	8,713	$	6,807	$	17,800	$	11,001

	Three Months Ended July 31,				Six Months Ended July 31,
	2022		2021		2022		2021
	(in thousands)
United States	$	2,333	$	219	$	4,586	$	578
Europe		4,082		3,520		8,694		6,102
Middle East & Africa		142		675		180		689
Asia-Pacific		2,042		2,188		4,226		2,893
Canada & Latin America		114		205		114		739
Total revenue from contracts with customers	$	8,713	$	6,807	$	17,800	$	11,001

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

	July 31, 2022		January 31, 2022
Contract Assets:	(in thousands)
Unbilled revenue - current	$	43	$	28
Total unbilled revenue	$	43	$	28
Contract Liabilities:
Deferred revenue & customer deposits - current	$	2,665	$	2,569
Total deferred revenue & customer deposits	$	2,665	$	2,569