Note 4 - Plant, Property, and Equipment, Net: Property, Plant and Equipment (Details) - USD ($)	Sep. 30, 2018	Mar. 31, 2018
Details
Machinery and Equipment, Gross	$ 3,285,970	$ 3,594,861
Office Equipment	769,106	769,589
Buildings and Improvements, Gross	12,437,555	13,606,722
Leasehold Improvements, Gross	3,876,194	4,240,568
Property, Plant and Equipment, Gross	20,368,825	22,211,740
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(5,606,865)	(5,418,327)
Plant, property, and equipment, net	$ 14,761,960	$ 16,793,413

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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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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-Section S99
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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated depreciation of equipment commonly used in offices and stores that have no permanent connection to the structure of a building or utilities. Examples include, but are not limited to, desks, chairs, tables, and bookcases.

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Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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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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