Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2022 USD ($) Derivative	Mar. 31, 2021 USD ($) Derivative
Significant Of Accounting Policies [Line Items]
Property and equipment, net	$ 2,000
Allowance for doubtful accounts receivable, period increase (decrease)	1,600	$ (2,400)
Sales return reserve, period increase (decrease)	$ 23,000	$ (17,000)
Foreign exchange forward contracts held | Derivative	0	0
Advertising expenses	$ 42,000	$ 23,000
Income taxes penalties
Income taxes interest
Minimum
Significant Of Accounting Policies [Line Items]
Credit extended periods	10 days
Maximum
Significant Of Accounting Policies [Line Items]
Credit extended periods	90 days
Microwaves
Significant Of Accounting Policies [Line Items]
Warranty period	one year period
Audio Products
Significant Of Accounting Policies [Line Items]
Warranty period	90 day period