Business Description and Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended		15 Months Ended
	Mar. 31, 2022 USD ($) Y	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for doubtful accounts	$ 196,000		$ 196,000	$ 131,000
Warranty period	27 months
Warranty reserve	$ 511,000		511,000
Inventory reserve	1,910,000		1,910,000	$ 1,742,000
Income taxes, refund received	113,000
Interest paid	$ 31,000	$ 33,000
Impairment of long-lived assets			$ 0
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Period inventory is expected to be used	2 years
Number of years of customer requirements | Y	1
Number of year's supply | Y	1