Note 6 - Intangible Assets (Details Textual) - USD ($)		1 Months Ended	3 Months Ended		7 Months Ended	12 Months Ended
	Sep. 12, 2016	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2018
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		$ 4,380,000
Contingent Consideration Classified as Equity, Fair Value Disclosure			1,010,000			$ 1,010,000
Impairment of Real Estate			$ 0			$ 0
Finite-Lived Intangible Asset, Useful Life			16 years
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months			$ 424,812
Finite-Lived Intangible Assets, Amortization Expense, After Year Thirteen			$ 283,215
Adjustments to Additional Paid in Capital, Patent Acquisition Liability Modification		$ 4,380,000		$ 4,380,000
Tesla Digital [Member]
Stock Issued During Period, Shares, Purchase of Assets					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