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Note 6 - Business Acquisitions (Details Textual) - USD ($)											9 Months Ended
	Aug. 31, 2018	Aug. 22, 2018	Jul. 31, 2018	Nov. 30, 2017	Oct. 31, 2017	Jul. 11, 2017	Jun. 16, 2017	Jun. 08, 2017	Jan. 31, 2017	Jan. 09, 2017	Sep. 30, 2018	Sep. 30, 2017
Payments to Acquire Businesses, Net of Cash Acquired, Total											$ 135,023,950	$ 10,586,890
Repayments of Short-term Debt Related to Acquisition											$ 427,500
Minimum [Member]
Property, Plant and Equipment, Useful Life											2 years
Finite-Lived Intangible Asset, Useful Life											2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life											15 years
Finite-Lived Intangible Asset, Useful Life											50 years
Tammy Lynn Outdoor, LLC [Member]
Business Combination, Consideration Transferred, Total			$ 16,688,254
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total											$ 16,688,254
Tammy Lynn Outdoor, LLC [Member] | Common Class A [Member]
Stock Issued During Period, Shares, Acquisitions			85,170
Key Outdoor, Inc [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total		$ 38,000,000									38,233,894
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred		233,894
Business Combination, Amount Held Back and Disbursed		1,900,000
Business Combination, Amount Held Back as Required Consent Holdback		329,467
Payments to Acquire Businesses, Gross		$ 36,004,427
Waitt Outdoor, LLC [Member]
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	$ 82,000,000										84,031,262
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred	2,031,262
Payments to Acquire Businesses, Gross	84,031,262
Other Restricted Assets, Noncurrent	$ 4,102,500
Clear Channel Outdoor Inc. [Member]
Payments to Acquire Businesses, Gross										$ 2,983,444
Other Restricted Assets, Noncurrent										$ 2,950,000
Hartlind Outdoor LLC [Member]
Payments to Acquire Businesses, Gross									$ 2,817,000
Corey Companies Inc. [Member] | Southeastern US [Member]
Payments to Acquire Businesses, Gross								$ 2,991,314
Goodwill, Purchase Accounting Adjustments											314,000
Amortization, Purchase Accounting Adjustments											(64,965)
Corey Companies Inc. [Member] | Southeastern US [Member] | Customer Relationships [Member]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles											(314,000)
Vision Outdoor Media LLC [Member] | Southeastern US [Member]
Payments to Acquire Businesses, Gross							$ 3,199,036
View Media, LLC [Member] | Southeastern US [Member]
Payments to Acquire Businesses, Gross						$ 623,596
Series of Individually Immaterial Business Acquisitions [Member] | Southeastern US [Member]
Payments to Acquire Businesses, Gross						900,000
Surety Support Services, Inc [Member]
Business Combination, Consideration Transferred, Total						450,000
Payments to Acquire Businesses, Gross						$ 22,500
Business Acquisition, Percentage of Voting Interests Acquired						100.00%
Business Combination, Consideration Transferred, Liabilities Incurred						$ 427,500
Repayments of Short-term Debt Related to Acquisition											$ 427,500
South Coast Surety Insurance Services, LLC [Member]
Business Combination, Consideration Transferred, Total					$ 2,908,581
Business Acquisition, Percentage of Voting Interests Acquired					70.00%
Remaining Ownership Interest Percentage					30.00%
Free State Bonds Inc. [Member]
Business Combination, Consideration Transferred, Total				$ 293,000
Payments to Acquire Businesses, Gross				$ 223,500
Business Acquisition, Percentage of Voting Interests Acquired				100.00%
Business Combination, Consideration Transferred, Liabilities Incurred				$ 69,500

X

- Definition

Amount of increase (decrease) in amortization from adjustments after acquisition date under purchase accounting.

+ References

No definition available.

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- Definition

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- Definition

The cash outflow for a borrowing having initial term of repayment within one year or the normal operating cycle, if longer. Related to an acquisition.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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