CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 6,457,295	$ 3,622,269	$ 9,398,063	$ 7,965,560
Cost of goods sold - acquired from Joint Venture		2,278,601		5,072,140
Cost of goods sold - other	4,353,267	253,322	6,216,892	558,245
GROSS PROFIT	2,104,028	1,090,346	3,181,171	2,335,175
Selling, general and administrative expense	1,264,209	1,134,909	2,250,878	2,371,748
Research and development expense	91,750	176,733	225,668	317,376
Operating income (loss)	748,069	(221,296)	704,625	(353,949)
Other expense:
Loss from investment in Hong Kong Joint Venture		(373,827)		(742,791)
Interest expense	(22,224)	(105,691)	(57,762)	(213,028)
NET INCOME (LOSS)	$ 725,845	$ (700,814)	$ 646,863	$ (1,309,768)
Earnings (Loss) per share:
Basic and diluted	$ 0.31	$ (0.30)	$ 0.28	$ (0.57)
Shares used in computing net earnings (loss) per share:
Weighted average basic and diluted shares outstanding	2,312,887	2,312,887	2,312,887	2,312,887