Business Combinations - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jul. 23, 2019	Dec. 31, 2018	Oct. 31, 2018	Oct. 06, 2017
Business Acquisition [Line Items]
Goodwill	$ 95,229		$ 86,646
Ab Initio
Business Acquisition [Line Items]
Cash and cash equivalents		$ 28
Accounts payable and accrued liabilities		(83)
Deferred tax liabilities, net		(1,609)
Intangible asset with finite life - core technology		7,400
Goodwill		6,275
Total consideration		$ 12,011
Vernalis
Business Acquisition [Line Items]
Cash and cash equivalents				$ 34,286
Restricted cash				2,836
Other assets				6,383
Accounts payable and accrued liabilities				(3,479)
Restructuring and product reserves				(9,241)
Deferred revenue				(746)
Intangible asset with finite life - core technology				7,000
Goodwill				5,939
Total consideration				$ 42,978
Crystal
Business Acquisition [Line Items]
Cash and cash equivalents					$ 224
Accounts receivable					2,513
Prepaid expenses and other current assets					201
Property and equipment, net					589
Current liabilities assumed					(354)
Deferred revenue					(4,624)
Deferred tax liabilities, net					(9,503)
Intangible asset with finite life - core technology					36,000
Goodwill					10,697
Total consideration					$ 35,743