Note 13 - Intangible Assets - Summary of Amortizable Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Gross Value, Assets	$ 97,946	$ 97,898
Customer relationships	(50,889)	(32,183)
Net Value, Assets	47,057	65,715
Gross Value, Liabilities	6,773	7,000
Accumulated Amortization, Liabilities	(6,339)	(4,726)
Net Value, Liabilities	434	2,274
Total net amortized intangible assets, gross value	91,173	90,898
Total net amortized intangible assets, accumulated amortization	(44,550)	(27,457)
Total net amortized intangible assets, net value	46,623	63,441
Customer Relationships [Member]
Gross Value, Assets	39,541	38,137
Customer relationships	(16,944)	(7,640)
Net Value, Assets	22,597	30,497
Construction Permits [Member]
Gross Value, Assets	23,959	25,959
Customer relationships	(12,484)	(13,494)
Net Value, Assets	11,475	12,465
Order or Production Backlog [Member]
Gross Value, Assets	10,201	9,713
Customer relationships	(9,247)	(5,795)
Net Value, Assets	954	3,918
Developed Technology Rights [Member]
Gross Value, Assets	9,354	9,233
Customer relationships	(3,752)	(1,384)
Net Value, Assets	5,602	7,849
Trademarks and Trade Names [Member]
Gross Value, Assets	8,993	9,075
Customer relationships	(3,667)	(1,381)
Net Value, Assets	5,326	7,694
Favorable Contracts, Noncompete Covenants and Other [Member]
Gross Value, Assets	5,898	5,781
Customer relationships	(4,795)	(2,489)
Net Value, Assets	1,103	3,292
Unfavorable Contracts and Leases [Member]
Gross Value, Liabilities	6,773	7,000
Accumulated Amortization, Liabilities	(6,339)	(4,726)
Net Value, Liabilities	$ 434	$ 2,274