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Note 6 - Business Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Aug. 31, 2018 | Aug. 22, 2018
Goodwill, Ending Balance | $ 106,272,501 | $ 98,685,795 |  |
Key Outdoor, Inc [Member] |  |  |  |
Structures and displays | 6,927,808 | 9,603,838 |  |
Structures and displays, adjustment | (2,676,030) |  |  |
Goodwill, Ending Balance | 21,257,030 | 19,499,000 |  |
Goodwill, adjustment | 1,758,030 |  |  |
Total Intangible Assets | 31,151,030 | 28,475,000 |  |
Total Intangible Assets, adjustment | 2,676,030 |  |  |
Accounts receivable |  |  |  |
Prepaid expenses | 233,894 | 233,894 |  |
Total Other Assets | 233,894 | 233,894 |  |
Total Assets Acquired | 38,312,732 | 38,312,732 |  |
Accounts payable and accrued expenses |  |  |  |
Asset retirement obligations | (78,838) | (78,838) |  |
Other long-term liabilities |  |  |  |
Total Liabilities Assumed | (78,838) | (78,838) |  |
Total | 38,233,894 | 38,233,894 |  | $ 38,000,000
Key Outdoor, Inc [Member] | Customer Relationships [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 8,627,000 | 7,692,000 |  |
Intangible Assets, adjustment | 935,000 |  |  |
Key Outdoor, Inc [Member] | Permits, Licenses and Lease Acquisition Costs [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 1,167,000 | 1,184,000 |  |
Intangible Assets, adjustment | (17,000) |  |  |
Key Outdoor, Inc [Member] | Easements [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total |  |  |  |
Key Outdoor, Inc [Member] | Off-Market Favorable Lease [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total |  |  |  |
Key Outdoor, Inc [Member] | Noncompetition and Nonsolicitation Agreements [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 100,000 | 100,000 |  |
Waitt Outdoor, LLC [Member] |  |  |  |
Structures and displays | 16,220,375 | 19,723,904 |  |
Structures and displays, adjustment | (3,503,529) |  |  |
Goodwill, Ending Balance | 48,650,475 | 46,381,946 |  |
Goodwill, adjustment | 2,268,529 |  |  |
Total Intangible Assets | 68,596,038 | 65,092,509 |  |
Total Intangible Assets, adjustment | 3,503,529 |  |  |
Accounts receivable | 1,239,457 | 1,239,457 |  |
Prepaid expenses | 1,551,084 | 1,551,084 |  |
Total Assets Acquired | 87,606,954 | 87,606,954 |  |
Accounts payable and accrued expenses | (761,779) | (761,779) |  |
Asset retirement obligations | (1,497,913) | (1,497,913) |  |
Other long-term liabilities | (1,316,000) | (1,316,000) |  |
Total Liabilities Assumed | (3,575,692) | (3,575,692) |  |
Total | 84,031,262 | 84,031,262 | $ 82,000,000 |
Total Other Assets | 2,790,541 | 2,790,541 |  |
Waitt Outdoor, LLC [Member] | Customer Relationships [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 13,984,000 | 12,696,000 |  |
Intangible Assets, adjustment | 1,288,000 |  |  |
Waitt Outdoor, LLC [Member] | Permits, Licenses and Lease Acquisition Costs [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 5,288,000 | 5,341,000 |  |
Intangible Assets, adjustment | (53,000) |  |  |
Waitt Outdoor, LLC [Member] | Easements [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | 454,563 | 454,563 |  |
Waitt Outdoor, LLC [Member] | Off-Market Favorable Lease [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total |  |  |  |
Waitt Outdoor, LLC [Member] | Noncompetition and Nonsolicitation Agreements [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | $ 219,000 | $ 219,000 |  |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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