4. Condensed Consolidated Balance Sheets (Details) - USD ($)	Sep. 30, 2018	Mar. 31, 2018
Inventories Details
Raw materials, net	$ 1,811,000	$ 1,619,000
Finished goods, net	1,142,000	1,246,000
Inventories, net	$ 2,953,000	$ 2,865,000

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