Note 7 - Receivables, Net (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

December 31,	2022		2021 (1)
Contracts completed and in progress:
Billed	$	220,809	$	236,053
Unbilled		120,348		126,371
Total contracts completed and in progress		341,157		362,424
Materials sales		52,182		43,746
Other		71,790		59,496
Total gross receivables		465,129		465,666
Less: allowance for credit losses		1,142		1,078
Total net receivables	$	463,987	$	464,588