5. Equipment and Leasehold Improvements (Details) - Property, Plant and Equipment - USD ($)	Mar. 31, 2019	Mar. 31, 2018
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation & amortization	$ (2,889,213)	$ (2,834,376)
Property and equipment, net	236,370	180,763
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	95,858	95,858
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,773,349	1,657,961
Automobiles [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23,712	23,712
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	595,475	600,419
Assets Held under Capital Leases [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 637,189	$ 637,189

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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