Note 5 - Goodwill and Other Intangible Assets, Net - Accumulated Amortization (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Accumulated amortization at the beginning of the period	$ 1,559,162	$ 1,177,798
Amortization expense	712,529	381,364
Accumulated amortization at end of period	$ 2,271,691	$ 1,559,162

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

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Balance Type:	debit
Period Type:	duration