Concentrations of Credit Risk, Customers, and Suppliers (Details Narrative) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2018
Total net sales	$ 45,802,574	$ 38,500,570
Republic of China [Member]
Debt description			The U.S. government imposed tariffs of up to 25% on certain goods imported from China. All of our products are manufactured and imported from China however, only our microphones are currently subject to a 7.5% tariff currently in place.
North America [Member]
Total net sales	$ 44,200,000	$ 36,000,000
Accounts Receivable [Member] | North America [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	10.00%	10.00%
Accounts Receivable [Member] | Four Customers [Member] | North America [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	70.00%	82.00%
Sales Revenue [Member] | Macau Subsidiary [Member]
Total net sales	$ 4,100,000	$ 5,100,000
Sales Revenue [Member] | Three Customers [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	69.00%	64.00%
Sales Revenue [Member] | Customers [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	10.00%
Sales Revenue [Member] | Customer One [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	36.00%	41.00%
Sales Revenue [Member] | Customer Two [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	20.00%	13.00%
Sales Revenue [Member] | Customer Three [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	13.00%	10.00%
Sales Revenue [Member] | Customer Four [Member] | Customer Concentration Risk [Member]
Concentration of sales risk, percentage	12.00%
Purchases [Member] | Customer Concentration Risk [Member] | Republic of China [Member]
Concentration of sales risk, percentage	100.00%	100.00%