Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details) - USD ($) $ in Thousands	Oct. 31, 2024	Jan. 31, 2024
Costs incurred on uncompleted contracts	$ 15,742	$ 21,912
Estimated earnings	11,766	11,270
Earned revenue	27,508	33,182
Less billings to date	26,359	30,580
Costs in excess of billings, net	1,149	2,602
Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts	2,499	3,097
Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts	(1,350)	(495)
Costs in excess of billings, net	$ 1,149	$ 2,602