Note 5 - Revenue From Contracts With Customers (Tables)

9 Months Ended

Oct. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended October 31,				Nine Months Ended October 31,
	2022		2021		2022		2021
Revenue recognized at a point in time:	(in thousands)
Seamap	$	2,777	$	6,876	$	15,059	$	15,045
Klein		1,847		1,328		3,630		3,884
Total revenue recognized at a point in time	$	4,624	$	8,204	$	18,689	$	18,929
Revenue recognized over time:
Seamap	$	260	$	143	$	1,082	$	419
Klein	$	—	$	—	$	2,913	$	—
Total revenue recognized over time		260		143		3,995		419
Total revenue from contracts with customers	$	4,884	$	8,347	$	22,684	$	19,348

	Three Months Ended October 31,				Nine Months Ended October 31,
	2022		2021		2022		2021
	(in thousands)
United States	$	931	$	967	$	5,517	$	1,545
Europe		1,972		3,491		10,666		9,593
Middle East & Africa		113		120		293		809
Asia-Pacific		1,796		3,667		6,022		6,560
Canada & Latin America		72		102		186		841
Total revenue from contracts with customers	$	4,884	$	8,347	$	22,684	$	19,348

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

	October 31, 2022		January 31, 2022
Contract Assets:	(in thousands)
Unbilled revenue - current	$	29	$	28
Total unbilled revenue	$	29	$	28
Contract Liabilities:
Deferred revenue & customer deposits - current	$	2,897	$	2,569
Total deferred revenue & customer deposits	$	2,897	$	2,569