6. Accrued Expenses (Details) - Schedule of Product Warranty Liability - USD ($)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule of Product Warranty Liability [Abstract]
Warranty reserve, at beginning of period	$ 111,983	$ 188,444
Warranty expense	58,082	4,823
Warranty deductions	(52,051)	(81,284)
Warranty reserve, at end of period	$ 118,014	$ 111,983