Note 5 - Fixed Assets - Fixed Assets (Details) - USD ($)	3 Months Ended
Mar. 31, 2021	Jun. 30, 2020
Less accumulated depreciation and amortization	$ (571,000)	$ (484,000)
Fixed assets, net	5,557,727	258,516
Manufacturing Equipment [Member]
Fixed assets, gross	$ 3,072,000	112,000
Manufacturing Equipment [Member] \| Minimum [Member]
Estimated useful life (Year)	2 years
Manufacturing Equipment [Member] \| Maximum [Member]
Estimated useful life (Year)	7 years
Leasehold Improvements [Member]
Estimated useful life (Year)	3 years
Fixed assets, gross	$ 1,259,000	229,000
Office Equipment, Furniture and Other [Member]
Fixed assets, gross	$ 966,000	312,000
Office Equipment, Furniture and Other [Member] \| Minimum [Member]
Estimated useful life (Year)	2 years
Office Equipment, Furniture and Other [Member] \| Maximum [Member]
Estimated useful life (Year)	7 years
Lab Equipment [Member]
Fixed assets, gross	$ 646,000	90,000
Lab Equipment [Member] \| Minimum [Member]
Estimated useful life (Year)	3 years
Lab Equipment [Member] \| Maximum [Member]
Estimated useful life (Year)	7 years
Asset under Construction [Member]
Fixed assets, gross	$ 186,000

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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