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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

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=116869197&loc=d3e4845-128472 + Details
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