Concentration Risk - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Concentration Risk [Line Items]
Cash, cash equivalents and restricted cash balances in excess of FDIC-insured limits	$ 25,800,000		$ 25,800,000		$ 5,000,000.0
Maximum
Concentration Risk [Line Items]
Cash and restricted cash deposit	$ 250,000		$ 250,000		$ 250,000
Customer Concentration Risk | Net Revenues | Three Largest Customers
Concentration Risk [Line Items]
Concentration risk, percentage	90.00%	77.00%	86.00%	76.00%
Customer Concentration Risk | Net Revenues | Amazon.com
Concentration Risk [Line Items]
Concentration risk, percentage	39.00%	22.00%	27.00%	22.00%
Customer Concentration Risk | Net Revenues | Walmart
Concentration Risk [Line Items]
Concentration risk, percentage	32.00%	32.00%	38.00%	37.00%
Customer Concentration Risk | Net Revenues | Fred Meyer
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%	23.00%	21.00%	17.00%
Product Concentration Risk | Net Revenues | Microwave Ovens
Concentration Risk [Line Items]
Concentration risk, percentage	26.00%	46.00%	33.00%	43.00%
Product Concentration Risk | Net Revenues | Audio Products
Concentration Risk [Line Items]
Concentration risk, percentage	73.00%	52.00%	67.00%	54.00%
Credit Concentration Risk | Accounts Receivable | Customer One
Concentration Risk [Line Items]
Concentration risk, percentage			43.00%		69.00%
Credit Concentration Risk | Accounts Receivable | Customer Two
Concentration Risk [Line Items]
Concentration risk, percentage			27.00%		28.00%
Supplier Concentration Risk | Products for Resale
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%	100.00%	100.00%
Supplier Concentration Risk | Products for Resale | Two Largest Factory Suppliers
Concentration Risk [Line Items]
Concentration risk, percentage	84.00%	53.00%	83.00%	58.00%