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Note 2 - Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)	Sep. 30, 2018 USD ($)
Allowance for Doubtful Accounts Receivable, Current, Ending Balance	$ 50,565	$ 24,121
Reserved Receivables	$ 0	0
Number of Reporting Units	3
Goodwill, Impairment Loss	$ 0	0
Goodwill, Ending Balance	98,685,795	24,692,161
Prepaid Expense	2,056,195	235,057
Advertising Agency Commissions	20,284	18,399
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total	0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	0	0
Accounting Standards Update 2016-02 [Member] \| Subsequent Event [Member]
Operating Lease, Liability, Total			$ 37,000,000
Operating Lease, Right-of-Use Asset			$ 37,000,000
Production Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	561,779	$ 173,750
Tammy Lynn Outdoor, LLC, Key Outdoor, Inc and Waitt Outdoor, LLC [Member]
Goodwill, Ending Balance	$ 73,679,634			$ 73,473,634
Minimum [Member]
Property, Plant and Equipment, Useful Life	2 years
Finite-Lived Intangible Asset, Useful Life	2 years
Land Lease, Prepayment Period	30 days
Lessor, Operating Lease, Term of Contract	30 days
Maximum [Member]
Property, Plant and Equipment, Useful Life	15 years
Finite-Lived Intangible Asset, Useful Life	50 years
Land Lease, Prepayment Period	1 year
Lessor, Operating Lease, Term of Contract	90 days