Note 6 - Contract Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

December 31,	2021		2020
Costs in excess of billings and estimated earnings	$	14,158	$	26,199
Contract retention		131,279		105,898
Total contract assets	$	145,437	$	132,097

Balance at December 31, 2020	$	132,097
Change in the measure of progress on projects, net		547,450
Revisions in estimates, net		(36,899	)
Billings		(461,294	)
Receipts related to contract retention		(35,917	)
Balance at December 31, 2021	$	145,437

Balance at December 31, 2019	$	163,578
Change in the measure of progress on projects, net		656,460
Revisions in estimates, net		(41,136	)
Billings		(606,982	)
Receipts related to contract retention		(39,823	)
Balance at December 31, 2020	$	132,097

December 31,	2021		2020
Billings in excess of costs and estimated earnings, net of retention	$	169,542	$	135,788
Provisions for losses		30,499		27,137
Total contract liabilities	$	200,041	$	162,925

Balance at December 31, 2020	$	162,925
Change in the measure of progress on projects, net		(1,770,667	)
Revisions in estimates, net		13,975
Billings		1,790,446
Change in provision for loss, net		3,362
Balance at December 31, 2021	$	200,041

Balance at December 31, 2019	$	85,293
Change in the measure of progress on projects, net		(1,748,830	)
Revisions in estimates, net		(3,856	)
Billings		1,807,911
Change in provision for loss, net		22,407
Balance at December 31, 2020	$	162,925