Note 4 - Intangible Assets (Details Textual) - USD ($)			1 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	Apr. 03, 2019	Sep. 12, 2016	Mar. 31, 2018	Jun. 30, 2021	Sep. 30, 2018	Dec. 31, 2020
Stock Issued During Period, Value, Purchase of Assets			$ 5,000,000
Development of Acquired Technology, Annual Compensation for Specialist		$ 200,000
Noncash or Part Noncash Acquisition, Noncash Consideration, Liability Incurred	$ 4,380,000
Contingent Consideration Classified as Equity, Fair Value Disclosure				$ 302,000		$ 1,380,000
Impairment of Real Estate				$ 0		$ 0
Finite-Lived Intangible Asset, Useful Life (Year)				16 years
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year				$ 424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Two				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Three				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Four				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Five				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Six				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Seven				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Eight				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Nine				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Ten				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year One				424,812
Finite-Lived Intangible Asset, Expected Amortization, Year Eleven				$ 283,215
Tesla Digital [Member]
Stock Issued During Period, Shares, Purchase of Assets (in shares)					1,000,000
Patented Technology [Member]
Stock Issued During Period, Value, Purchase of Assets		5,000,000
Noncash or Part Noncash Acquisition, Noncash Consideration, Carrying Value of Properties to be Transferred		2,161,467
Noncash or Part Noncash Acquisition, Noncash Consideration, Original Cost of Property Transferred		$ 202,666