Note 4 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Total revenue from contracts with customers	$ 13,561	$ 10,036	$ 21,463	$ 19,714
Transferred at Point in Time [Member]
Total revenue from contracts with customers	13,215	9,661	20,771	19,038
Transferred over Time [Member]
Total revenue from contracts with customers	346	375	692	676
UNITED STATES
Total revenue from contracts with customers	736	446	1,286	771
CHINA
Total revenue from contracts with customers	618	1,462	877	7,230
NORWAY
Total revenue from contracts with customers	8,906	6,217	12,181	8,975
TÜRKIYE
Total revenue from contracts with customers	982	205	1,209	238
SINGAPORE
Total revenue from contracts with customers	1,413	260	2,440	471
CANADA
Total revenue from contracts with customers	152	0	669	0
JAPAN
Total revenue from contracts with customers	272	21	950	224
Other Countries [Member]
Total revenue from contracts with customers	$ 482	$ 1,425	$ 1,851	$ 1,805