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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2018
Valuation And Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts

Schedule II-A—Valuation and Qualifying Accounts

Allowance for Doubtful Accounts Receivable (in thousands)

 

 

 

Balance at

 

 

Additions

Charged to

 

 

 

 

 

 

Balance at

 

Fiscal Year Ended

 

Beginning of

Period

 

 

Costs and

Expenses

 

 

Deductions

 

 

End of

Period

 

December 31, 2018

 

$

46

 

 

$

1,217

 

 

$

—

 

 

$

1,263

 

December 31, 2017

 

$

42

 

 

$

31

 

 

$

(27

)

 

$

46

 

December 31, 2016

 

$

423

 

 

$

3

 

 

$

(384

)

 

$

42

 

 

 

Inventory Reserve (in thousands)

 

 

 

Balance at

 

 

 

 

 

 

 

Balance at

 

Fiscal Year Ended

 

Beginning of

Period

 

 

Additions

 

 

Deductions

 

 

End of

Period

 

December 31, 2018

 

$

3,137

 

 

 

476

 

 

$

(1,624

)

 

$

1,989

 

December 31, 2017

 

$

3,594

 

 

 

—

 

 

$

(457

)

 

$

3,137

 

December 31, 2016

 

$

4,020

 

 

 

—

 

 

$

(426

)

 

$

3,594

 

 

See accompanying report of independent registered public accounting firm on page 41 of this annual report.