General form of registration statement for all companies including face-amount certificate companies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Warranty Reserve (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Warranty Reserve (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES    
Standard assurance warranty period 1 year 1 year
Movement in Standard Product Warranty Accrual [Roll Forward]    
Warranty reserve, at the beginning of the year $ 1,491 $ 116
Additions to warranty reserve 375 2,352
Claims fulfilled (132) (977)
Warranty reserve, at the end of the period $ 1,734 $ 1,491