XML 113 R98.htm IDEA: XBRL DOCUMENT v3.20.4
SCHEDULE II - VALUATION RESERVES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]      
Balance at beginning of year $ 3,714 $ 3,404  
Accounts Receivable, Credit Loss Expense (Reversal) 815 821 $ 541
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction (747) (511) (111)
Balance at end of year $ 3,782 $ 3,714 $ 3,404