Note 19 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Federal statutory tax, amount	$ (34,957)	$ (16,186)	$ 1,749
Federal statutory tax, rate	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit, amount	$ 1,696	$ (2,905)	$ 1,163
State taxes, net of federal tax benefit, rate	(1.00%)	3.80%	14.00%
Foreign Taxes, amount	$ (1,374)	$ 0	$ (182)
Foreign Taxes, rate	0.80%	0.00%	(2.20%)
Percentage depletion deduction, amount	$ (1,096)	$ (932)	$ (951)
Percentage depletion deduction, rate	0.70%	1.20%	(11.40%)
Non-controlling interests, amount	$ 4,423	$ (733)	$ (2,289)
Non-controlling interests, rate	(2.70%)	1.00%	(27.50%)
Nondeductible expenses, amount	$ 1,073	$ 2,171	$ 4,842
Nondeductible expenses, rate	(0.60%)	(2.80%)	58.20%
Non-cash impairment charges, amount	$ 32,905	$ 0	$ 0
Non-cash impairment charges	(19.80%)	0.00%	0.00%
Company-owned life insurance	$ 0		$ 410
Company-owned life insurance, rate	0.00%	1.10%	4.90%
Company-owned life insurance		$ (870)
Stock-based Compensation, amount	$ 0	$ 0	$ (815)
Stock-based Compensation	0.00%	0.00%	(9.80%)
Changes in uncertain tax positions, amount	$ (1,781)	$ (912)	$ (772)
Changes in uncertain tax positions, rate	1.10%	1.20%	(9.30%)
Capital loss expiration, amount	$ 0	$ 0	$ 8,423
Capital loss expiration, rate	0.00%	0.00%	101.20%
Valuation allowance, amount	$ 4,197	$ 1,727	$ (6,795)
Valuation allowance, rate	(2.50%)	(2.20%)	(81.60%)
Gain/Loss on Sale of Entity	$ (3,827)	$ 0	$ 0
Gain/Loss on Sale of Entity, rate	2.30%	0.00%	0.00%
Purchase Price Accounting, amount	$ 0	$ (1,308)	$ 0
Purchase Price Accounting, rate	0.00%	1.70%	0.00%
Tax Cuts and Jobs Act of 2017, amount	$ 0	$ 0	$ (7,980)
Tax Cuts and Jobs Act of 2017, rate	0	0	(95.8)
Other, amount	$ (1,541)	$ (428)	$ (11)
Other, rate	0.90%	0.40%	(0.20%)
Total, amount	$ (282)	$ (20,376)	$ (3,208)
Total, rate	0.20%	26.40%	(38.50%)