Note 5 - Revenue From Contracts With Customers (Tables)

9 Months Ended

Oct. 31, 2021

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended October 31,				Nine Months Ended October 31,
	2021		2020		2021		2020
Revenue recognized at a point in time:	(in thousands)
Seamap	$	6,876	$	5,196	$	15,045	$	11,066
Klein		1,328		1,150		3,884		3,152
Total revenue recognized at a point in time	$	8,204	$	6,346	$	18,929	$	14,218
Revenue recognized over time:
Seamap	$	143	$	195	$	419	$	596
Total revenue recognized over time		143		195		419		596
Total revenue from contracts with customers	$	8,347	$	6,541	$	19,348	$	14,814

	Three Months Ended October 31,				Nine Months Ended October 31,
	2021		2020		2021		2020
	(in thousands)
United States	$	967	$	282	$	1,545	$	2,068
Europe		3,491		2,001		9,593		4,981
Middle East & Africa		120		757		809		1,054
Asia-Pacific		3,667		3,342		6,560		5,841
Canada & Latin America		102		159		841		870
Total revenue from contracts with customers	$	8,347	$	6,541	$	19,348	$	14,814

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

	October 31, 2021		January 31, 2021
Contract Assets:	(in thousands)
Unbilled revenue - current	$	57	$	85
Total unbilled revenue	$	57	$	85
Contract Liabilities:
Deferred revenue & customer deposits - current	$	863	$	691
Total deferred revenue & customer deposits	$	863	$	691