Note 4 - Plant, Property, and Equipment, Net: Property, Plant and Equipment (Details) - USD ($)	Jun. 30, 2016	Mar. 31, 2016
Details
Machinery and Equipment, Gross	$ 1,723,191	$ 1,740,751
Office Equipment and Automobiles	474,300	486,779
Buildings and Improvements, Gross	12,885,075	12,605,012
Leasehold Improvements, Gross	1,206,418	1,238,160
Property, Plant and Equipment, Gross	16,288,984	16,070,702
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(3,289,603)	(3,197,705)
Plant, property, and equipment, net	$ 12,999,381	$ 12,872,997