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Warranty Reserve (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 31, 2021
Jun. 30, 2021
Guarantees and Product Warranties [Abstract]    
Beginning balance $ 197 $ 181
Warranty reserve assumed from acquisition of TN Companies 483 0
Charged to cost of revenues 169 226
Usage (214) (210)
Ending balance $ 635 $ 197