Note 5 - Revenue From Contracts With Customers (Tables)

3 Months Ended

Apr. 30, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended April 30,
	2022		2021
Revenue recognized at a point in time:	(in thousands)
Seamap	$	7,994	$	2,913
Klein		1,008		1,150
Total revenue recognized at a point in time	$	9,002	$	4,063
Revenue recognized over time:
Seamap	$	85	$	131
Klein	$	—	$	—
Total revenue recognized over time		85		131
Total revenue from contracts with customers	$	9,087	$	4,194

	Three Months Ended April 30,
	2022		2021
	(in thousands)
United States	$	2,253	$	359
Europe		4,612		2,582
Middle East & Africa		38		14
Asia-Pacific		2,184		705
Canada & Latin America		—		534
Total revenue from contracts with customers	$	9,087	$	4,194

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

	April 30, 2022		January 31, 2022
Contract Assets:	(in thousands)
Unbilled revenue - current	$	2	$	28
Total unbilled revenue	$	2	$	28
Contract Liabilities:
Deferred revenue & customer deposits - current	$	2,455	$	2,569
Total deferred revenue & customer deposits	$	2,455	$	2,569