Note 7 - Intangible Assets - Schedule of Future Amortization, Intangible Assets Acquired in Acquisitions (Details) - USD ($)	9 Months Ended
Sep. 30, 2020	Dec. 31, 2019
2021	$ 3,800,301
2022	3,759,746
2023	3,729,379
2024	3,666,543
2025	3,657,871
Thereafter	12,564,732
Total	31,178,572
Customer Relationships [Member]
2021	2,439,725
2022	2,408,935
2023	2,408,935
2024	2,408,935
2025	2,408,935
Thereafter	7,319,892
Total	$ 19,395,357	$ 19,853,413
Intangible assets, weighted average useful life (Month)	84 months
Permits, Licenses and Lease Acquisition Costs [Member]
2021	$ 986,582
2022	986,582
2023	986,582
2024	986,582
2025	979,913
Thereafter	3,627,740
Total	$ 8,553,981	8,862,184
Intangible assets, weighted average useful life (Month)	105 months
Site Location [Member]
2021	$ 56,623
2022	56,623
2023	56,623
2024	56,623
2025	56,623
Thereafter	387,003
Total	$ 670,118	712,508
Intangible assets, weighted average useful life (Month)	142 months
Noncompete Agreements [Member]
2021	$ 104,971
2022	95,206
2023	64,839
2024	2,003
2025	0
Thereafter	0
Total	$ 267,019	356,682
Intangible assets, weighted average useful life (Month)	29 months
Technology-Based Intangible Assets [Member]
2021	$ 99,000
2022	99,000
2023	99,000
2024	99,000
2025	99,000
Thereafter	445,590
Total	$ 940,590	0
Intangible assets, weighted average useful life (Month)	114 months
Trademarks and Trade Names [Member]
2021	$ 113,400
2022	113,400
2023	113,400
2024	113,400
2025	113,400
Thereafter	784,507
Total	$ 1,351,507	$ 454,300
Intangible assets, weighted average useful life (Month)	143 months

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 350
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