Note 4 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Costs Incurred for Uncompleted Contracts, Anticipated Collection Period (Year)	1 year
Contract with Customer, Liability, Revenue Recognized	$ 800	$ 1,200
Unbilled Receivables, Current	2,656	247
Middle East [Member]
Unbilled Receivables, Current	$ 2,700	200
Other Nonoperating Income (Expense) [Member]
Expense Related to Encashment		$ 600