Note 5 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Seamap	$ 35,091	$ 23,107
UNITED STATES
Seamap	6,918	2,409
Europe, Russia and CIS [Member]
Seamap	14,814	8,821
Middle East and Africa [Member]
Seamap	12,876	11,244
Asia Pacific [Member]
Seamap	483	633
Transferred at Point in Time [Member]
Seamap	28,923	21,850
Transferred over Time [Member]
Seamap	6,168	1,257
Seamap [Member] | Transferred at Point in Time [Member]
Seamap	22,544	16,422
Seamap [Member] | Transferred over Time [Member]
Seamap	2,468	871
Klein [Member] | Transferred at Point in Time [Member]
Seamap	6,379	5,428
Klein [Member] | Transferred over Time [Member]
Seamap	$ 3,700	$ 386