Note 19 - Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Federal statutory tax, amount	$ (1,994)	$ 1,681	$ (8,366)
Federal statutory tax, rate	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit, amount	$ (1,412)	$ 3,056	$ (1,328)
State taxes, net of federal tax benefit, rate	14.90%	38.20%	3.30%
Foreign Taxes, amount	$ 966	$ 915	$ 1,395
Foreign Taxes, rate	(10.20%)	11.40%	(3.50%)
Percentage depletion deduction, amount	$ (1,015)	$ (1,096)	$ (932)
Percentage depletion deduction, rate	10.70%	(13.70%)	2.30%
Non-controlling interests, amount	$ 1,613	$ 4,423	$ (733)
Non-controlling interests, rate	(17.00%)	55.30%	1.80%
Nondeductible expenses, amount	$ 1,300	$ 584	$ 1,462
Nondeductible expenses, rate	(13.70%)	7.30%	(3.70%)
Company-owned life insurance, amount	$ (731)	$ (591)	$ (870)
Company-owned life insurance, rate	7.70%	(7.40%)	2.20%
Stock-based Compensation, amount	$ (660)	$ 502	$ 0
Stock-based compensation, rate	6.90%	6.30%	0.00%
Changes in uncertain tax positions, amount	$ 0	$ (1,662)	$ (923)
Changes in uncertain tax positions, rate	0.00%	(20.80%)	2.30%
Valuation allowance, amount	$ 0	$ 3,550	$ 0
Valuation allowance, rate	0.00%	44.40%	0.00%
Purchase Price Accounting, amount	$ 0	$ 0	$ (1,308)
Purchase Price Accounting, rate	0.00%	0.00%	3.30%
Provision to return adjustments, amount	$ 702	$ (1,456)	$ (640)
Provision to return adjustments, rate	(7.40%)	(18.20%)	1.60%
Other, amount	$ (6)	$ 21	$ (45)
Other, rate	0.10%	(1.90%)	(0.10%)
Total, amount	$ (1,237)	$ 9,927	$ (12,288)
Total, rate	13.00%	121.90%	30.50%