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Guarantees (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Product Warranty    
Period of warranty 12 months  
Change in warranty accrual    
Beginning accrued product warranty $ 743,000 $ 609,000
Accruals for warranties issued 1,024,000 711,000
Adjustments related to pre-existing warranties including expirations and changes in estimates (286,000) (100,000)
Cost of warranty repair (812,000) (477,000)
Ending accrued product warranty $ 669,000 $ 743,000