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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accumulated amortization	$ (21,125,704)	$ (20,173,881)
Balance	32,677,214
Total, cost	56,500,798	52,445,462
Intangible assets, net	35,375,094	32,271,581
Easements [Member]
Accumulated amortization
Balance	2,697,880	2,032,494
Customer Relationships [Member]
Cost	39,855,900	37,743,900
Accumulated amortization	(18,547,994)	(17,890,487)
Balance	21,307,906	19,853,413
Permits, Licenses and Lease Acquisition Costs [Member]
Cost	10,613,471	10,305,521
Accumulated amortization	(1,675,972)	(1,443,337)
Balance	8,937,499	8,862,184
Site Location [Member]
Cost	849,347	849,347
Accumulated amortization	(150,995)	(136,839)
Balance	698,352	712,508
Noncompete Agreements [Member]
Cost	626,000	626,000
Accumulated amortization	(300,618)	(269,318)
Balance	325,382	356,682
Trademarks and Trade Names [Member]
Cost	1,692,200	722,200
Accumulated amortization	(284,125)	(267,900)
Balance	1,408,075	454,300
Technology-Based Intangible Assets [Member]
Cost	138,000	138,000
Accumulated amortization	(138,000)	(138,000)
Balance
Nonsolicitation Agreement [Member]
Cost	28,000	28,000
Accumulated amortization	(28,000)	(28,000)
Balance

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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