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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Accumulated amortization	$ (27,650,847)	$ (24,160,885)
Balance	38,064,857
Total, cost	70,326,793	68,534,794
Intangible assets, net	42,675,946	44,373,909
Easements [Member]
Accumulated amortization	0	0
Balance	4,611,089	4,507,089
Customer Relationships [Member]
Cost	48,283,484	46,740,483
Accumulated amortization	(22,943,605)	(20,558,751)
Balance	25,339,879	26,181,732
Permits, Licenses and Lease Acquisition Costs [Member]
Cost	10,948,673	11,053,673
Accumulated amortization	(3,159,510)	(2,412,313)
Balance	7,789,163	8,641,360
Site Location [Member]
Cost	849,347	849,347
Accumulated amortization	(235,813)	(193,462)
Balance	613,534	655,885
Noncompete Agreements [Member]
Cost	626,000	626,000
Accumulated amortization	(463,884)	(386,934)
Balance	162,116	239,066
Technology-Based Intangible Assets [Member]
Cost	1,128,000	1,128,000
Accumulated amortization	(286,296)	(212,250)
Balance	841,704	915,750
Trademarks and Trade Names [Member]
Cost	3,852,200	3,602,202
Accumulated amortization	(533,739)	(369,175)
Balance	3,318,461	3,233,027
Nonsolicitation Agreement [Member]
Cost	28,000	28,000
Accumulated amortization	(28,000)	(28,000)
Balance	$ 0	$ 0

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