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Note 4 - Revenue Recognition - Reconciliation of the Cost in Excess of Billings (Details) - USD ($) $ in Thousands | Apr. 30, 2022 | Jan. 31, 2022
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Costs incurred on uncompleted contracts | $ 23,326 | $ 20,021
Estimated earnings | 13,531 | 12,030
Earned revenue | 36,857 | 32,051
Less billings to date | 32,026 | 31,019
Costs in excess of billings, net | 4,831 | 1,032
Contract assets: Costs and estimated earnings in excess of billings on uncompleted contracts | 6,004 | 2,309
Contract liabilities: Billings in excess of costs and estimated earnings on uncompleted contracts | $ (1,173) | $ (1,277)

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