Note 4 - Revenue Recognition (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2023	Jan. 31, 2023
Costs Incurred for Uncompleted Contracts, Anticipated Collection Period (Year)	1 year
Unbilled Receivables, Current	$ 11,907	$ 11,634
Middle East [Member]
Unbilled Receivables, Current	$ 11,900	$ 11,600

Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements due within one year or the normal operating cycle, if longer.

No definition available.

Name:	us-gaap_UnbilledReceivablesCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant