XML 88 R47.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Collaborations - Summary of Changes in Accounts Receivable and Contract Liabilities (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Accounts receivable:    
Accounts receivable, Balance at Beginning of Period $ 7,547 $ 10,471
Accounts receivable, Additions 15,999 16,498
Accounts receivable, Deductions (18,926) (19,422)
Accounts receivable, Balance at End of Period 4,620 7,547
Contract liabilities:    
Deferred revenue, Balance at Beginning of Period 55,932 59,868
Deferred revenue, Additions 4,000 19,000
Deferred revenue, Deductions (31,122) (22,936)
Deferred revenue, Balance at End of Period $ 28,810 $ 55,932