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Schedule II - Valuation Accounts
12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation Accounts
Schedule II
Valuation Accounts
Allowance for Doubtful Accounts
(in thousands)
 
Fiscal Year Ended
December 31,
201920182017
Balance at beginning of period$931  $809  $1,069  
Additions—charged to expense1,360  1,620  290  
Deductions—bad debts written off, net of recoveries(823) (1,498) (550) 
Balance at end of period$1,468  $931  $809