Note 16 - Stock Based Compensation - Compensation Expenses (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Stock Based Compensation [Member]
Compensation expense	$ 746,300	$ 1,176,600
Professional Fees [Member]
Compensation expense	279,000	36,000
Stock Based Compensation and Professional Fees [Member]
Compensation expense	$ 1,025,300	$ 1,212,600

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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