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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
 
 
 
Additions
 
 
 
 
Description
Balance at Beginning of Year
 
Charged to Cost and Expenses
 
Charged to Other Accounts
 
Acquisition
 
Deductions
 
Balance at End of Year
Allowance for doubtful accounts:
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2019
$
559

 
$
232

 
$
10

 
$
—

 
$
(195
)
 
$
606

Year ended December 31, 2018
$
566

 
$
239

 
$
(54
)
 
$
—

 
$
(192
)
 
$
559

Year ended December 31, 2017
$
151

 
$
410

 
$
5

 
$
—

 
$
—

 
$
566

Allowance for sales returns:
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2019
$
1,259

 
$
(346
)
 
$
—

 
$
—

 
$
(183
)
 
$
730

Year ended December 31, 2018
$
1,121

 
$
969

 
$
—

 
$
—

 
$
(831
)
 
$
1,259

Year ended December 31, 2017
$
523

 
$
598

 
$
—

 
$
—

 
$
—

 
$
1,121

Deferred tax asset valuation allowance:
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2019
$
85,938

 
$
8,722

 
$
—

 
$
—

 
$
—

 
$
94,660

Year ended December 31, 2018
$
92,081

 
$
—

 
$
3,715

 
$
—

 
$
(9,858
)
 
$
85,938

Year ended December 31, 2017
$
20,821

 
$
—

 
$
873

 
$
71,722

 
$
(1,335
)
 
$
92,081

Self-insurance liabilities:
 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2019
$
1,011

 
$
622

 
$
—

 
$
—

 
$
(276
)
 
$
1,357

Year ended December 31, 2018
$
1,289

 
$
348

 
$
—

 
$
—

 
$
(626
)
 
$
1,011

Year ended December 31, 2017
$
428

 
$
1,660

 
$
—

 
$
—

 
$
(799
)
 
$
1,289