Condensed Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net revenues	$ 854,696	$ 931,139	$ 1,611,663	$ 2,077,494
Cost of sales	332,617	351,894	637,038	972,689
Gross profit	522,079	579,245	974,625	1,104,805
Operating expenses:
Research and development	106,715	139,227	216,583	289,184
Selling, general and administrative	328,909	363,183	654,491	735,045
Total operating expenses	435,624	502,410	871,074	1,024,229
Income from operations	86,455	76,835	103,551	80,576
Other income (expense):
Interest income	7,197	4,928	13,446	6,548
Interest and finance expenses	(1,245)	(727)	(1,973)	(1,455)
Total other income (expense)	5,952	4,201	11,473	5,093
Income before provision for (benefit from) income taxes	92,407	81,036	115,024	85,669
Provision for (benefit from) income taxes:
Current	6,000	2,000	6,000	4,000
Deferred	(32,000)	79,000	(32,000)	154,000
Total provision for (benefit from) income taxes	(26,000)	81,000	(26,000)	158,000
Net income (loss)	$ 118,407	$ 36	$ 141,024	$ (72,331)
Basic and diluted earnings per common share: (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Weighted average shares of common stock outstanding - basic and diluted (in shares)	67,588,492	67,588,492	67,588,492	67,588,492