Note 7 - Intangible Assets - Schedule of Future Amortization, Intangible Assets Acquired in Acquisitions (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Dec. 31, 2018
2019	$ 11,061,171
2020	9,710,294
2021	4,498,398
2022	1,072,620
2023	1,019,088
Thereafter	5,149,814
Total	32,511,385
Customer Relationships [Member]
2019	9,937,564
2020	8,606,874
2021	3,411,693
2022
2023
Thereafter
Total	$ 21,956,131	$ 24,312,336
Intangible assets, weighted average useful life (Month)	2 years
Permits, Licenses and Lease Acquisition Costs [Member]
2019	$ 869,732
2020	869,732
2021	869,732
2022	869,732
2023	869,732
Thereafter	4,499,285
Total	$ 8,847,945	9,040,336
Intangible assets, weighted average useful life (Month)	10 years 60 days
Site Location [Member]
2019	$ 56,623
2020	56,623
2021	56,623
2022	56,623
2023	56,623
Thereafter	472,054
Total	$ 755,169	769,131
Intangible assets, weighted average useful life (Month)	13 years 120 days
Noncompete Agreements [Member]
2019	$ 123,200
2020	112,165
2021	95,450
2022	81,365
2023	27,833
Thereafter
Total	$ 440,013	468,483
Intangible assets, weighted average useful life (Month)	3 years 210 days
Trademarks and Trade Names [Member]
2019	$ 70,208
2020	64,900
2021	64,900
2022	64,900
2023	64,900
Thereafter	178,475
Total	$ 508,283	526,783
Intangible assets, weighted average useful life (Month)	5 years
Technology-Based Intangible Assets [Member]
2019	$ 3,844
2020
2021
2022
2023
Thereafter
Total	$ 3,844	$ 15,343
Intangible assets, weighted average useful life (Month)	30 days

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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