Revenue Recognition - Schedule of Changes in Contract Assets and Liabilities (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Contract assets:
Total contract assets, Balance at Beginning of Period	$ 9,880
Contract assets, Addition	5,628
Contract assets, Deduction	(11,725)
Total contract assets, Balance at End of Period	3,783
Contract liabilities:
Total contract liabilities, Balance at Beginning of Period	6,335
Contract liabilities, Addition	2,628
Contract liabilities, Deduction	(3,445)
Total contract liabilities, Balance at End of Period	5,518
Unbilled - collaboration and license revenue
Contract assets:
Total contract assets, Balance at Beginning of Period	9,880
Contract assets, Addition	5,628
Contract assets, Deduction	(11,725)
Total contract assets, Balance at End of Period	3,783
Deferred revenue
Contract liabilities:
Total contract liabilities, Balance at Beginning of Period	6,335
Contract liabilities, Addition	2,628
Contract liabilities, Deduction	(3,445)
Total contract liabilities, Balance at End of Period	$ 5,518