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Revenue Arrangements (Tables)
 6 Months Ended
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of Changes in Contract Liabilities
The following table presents changes in the Company’s contract liabilities during the six months ended June 30, 2020 (in thousands):
 
 
Balance at
 
 
 
 
 
Balance at
 
 
beginning of period
 
Additions
 
Deductions
 
end of period
Six Months Ended June 30, 2020
 
 
 
 
 
 
 
 
Contract liabilities:
 
 
 
 
 
 
 
 
     Deferred revenue
 
$
16,354

 
$
2,000

 
$
(14
)
 
$
18,340

Total contract liabilities
 
$
16,354

 
$
2,000

 
$
(14
)
 
$
18,340