Note 5 - Revenue From Contracts With Customers (Tables)

12 Months Ended

Jan. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Twelve Months Ended January 31,
	2023		2022
Revenue recognized at a point in time:	(in thousands)
Seamap	$	22,544	$	16,422
Klein		6,379		5,428
Total revenue recognized at a point in time	$	28,923	$	21,850
Revenue recognized over time:
Seamap	$	2,468	$	871
Klein	$	3,700	$	386
Total revenue recognized over time		6,168		1,257
Total revenue from contracts with customers	$	35,091	$	23,107

	Twelve Months Ended January 31,
	2023		2022
Revenue from contracts with customers:	(in thousands)
United States	$	6,918	$	2,409
Europe		14,814		8,821
Asia-Pacific		12,876		11,244
Other		483		633
Total revenue from contracts with customers	$	35,091	$	23,107

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

	January 31, 2023		January 31, 2022
Contract Assets:	(in thousands)
Unbilled revenue-current	$	2	$	28
Total unbilled revenue	$	2	$	28
Contract Liabilities:
Deferred revenue & customer deposits - current	$	571	$	2,569
Total deferred revenue & customer deposits	$	571	$	2,569