Note 19 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Receivables	$ 3,173	$ 3,044
Insurance	14,334	12,654
Deferred compensation	11,133	11,187
Accrued compensation	3,792	9,721
Other accrued liabilities	1,088	1,283
Contract income recognition	11,453	15,638
Lease liabilities	16,351	16,342
Net operating loss carryforwards	59,760	52,181
Valuation allowance	(26,533)	(29,547)	$ (25,271)
Other	8,440	10,531
Total long-term deferred tax assets	102,991	103,034
Property and equipment	64,915	46,153
Right of use assets	15,791	15,792
Total long-term deferred tax liabilities	80,706	61,945
Net long-term deferred tax assets	$ 22,285	$ 41,089