Note 6 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Total revenue from contracts with customers	$ 4,974	$ 3,038	$ 23,132	$ 16,142
Transferred at Point in Time [Member]
Total revenue from contracts with customers	4,458	2,778	21,966	15,060
Transferred over Time [Member]
Total revenue from contracts with customers	516	260	1,166	1,082
UNITED STATES
Total revenue from contracts with customers	351	131	852	1,895
Europe [Member]
Total revenue from contracts with customers	2,019	1,547	11,013	9,130
Asia Pacific [Member]
Total revenue from contracts with customers	1,591	1,252	10,085	4,850
Other Countries [Member]
Total revenue from contracts with customers	$ 1,013	$ 108	$ 1,182	$ 267