Note 3 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Property and equipment, gross	$ 15,641,947	$ 11,122,732
Net Property and Equipment	4,825,952	1,431,649
Production Equipment [Member]
Property and equipment, gross	10,228,216	8,492,567
Production Equipment Under Finance Lease [Member]
Property and equipment, gross	1,113,412	1,121,622
Lab Equipment [Member]
Property and equipment, gross	99,831	82,930
Computer Equipment [Member]
Property and equipment, gross	484,943	204,807
Vehicles [Member]
Property and equipment, gross	143,373	10,555
Vehicles Under Finance Lease [Member]
Property and equipment, gross	$ 50,815	61,156
Furniture and Fixtures [Member]
Useful Life (Year)	5 years
Property and equipment, gross	$ 1,202,155	111,417
Furniture and Fixtures Under Finance Lease [Member]
Useful Life (Year)	5 years
Property and equipment, gross	$ 198,045
Leasehold Improvements [Member]
Property and equipment, gross	2,121,157	1,037,678
Property, Plant and Equipment Not Under Finance Lease [Member]
Less Accumulated Depreciation	(9,659,850)	(8,521,811)
Property, Plant and Equipment Under Finance Lease [Member]
Less Accumulated Depreciation	$ (1,156,145)	$ (1,169,272)
Minimum [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Production Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Production Equipment Under Finance Lease [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Lab Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Computer Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Vehicles [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Vehicles Under Finance Lease [Member]
Useful Life (Year)	3 years
Minimum [Member] \| Leasehold Improvements [Member]
Useful Life (Year)	5 years
Maximum [Member]
Useful Life (Year)	10 years
Maximum [Member] \| Production Equipment [Member]
Useful Life (Year)	10 years
Maximum [Member] \| Production Equipment Under Finance Lease [Member]
Useful Life (Year)	10 years
Maximum [Member] \| Lab Equipment [Member]
Useful Life (Year)	10 years
Maximum [Member] \| Computer Equipment [Member]
Useful Life (Year)	5 years
Maximum [Member] \| Vehicles [Member]
Useful Life (Year)	5 years
Maximum [Member] \| Vehicles Under Finance Lease [Member]
Useful Life (Year)	5 years
Maximum [Member] \| Leasehold Improvements [Member]
Useful Life (Year)	15 years

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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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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