Note 4 - Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Total revenue from contracts with customers	$ 5,622	$ 13,561	$ 15,294	$ 21,463
Transferred at Point in Time [Member]
Total revenue from contracts with customers	5,338	13,215	14,394	20,771
Transferred over Time [Member]
Total revenue from contracts with customers	284	346	900	692
UNITED STATES
Total revenue from contracts with customers	970	736	1,132	1,286
CHINA
Total revenue from contracts with customers	240	770	5,127	1,546
NORWAY
Total revenue from contracts with customers	2,282	8,906	5,922	12,181
TÜRKIYE
Total revenue from contracts with customers	820	982	965	1,209
SINGAPORE
Total revenue from contracts with customers	0	1,413	0	2,440
NETHERLANDS
Total revenue from contracts with customers	862	0	1,556	0
JAPAN
Total revenue from contracts with customers	84	272	84	950
Other Countries [Member]
Total revenue from contracts with customers	$ 364	$ 482	$ 508	$ 1,851