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Commitments and Contingencies - Contingent Acquisition Obligations (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2018
Contingent Acquisition Obligations |  |
Beginning fair value |  | $ 15,713
Addition of contingent earnout obligations |  | 5,173
Changes in fair value for contingent earnout obligations |  | 216
Ending fair value |  | 21,102
Mr. Chopra, Chief Executive Officer | Deferred bonus |  |
Indemnifications and Certain Employment-Related Contingencies |  |
Bonus payment on or within 45 days of January 1, 2024 contingent upon continued employment through that date | $ 13,500 |
Maximum number of days after January 1, 2024, bonus payment due | 45 days |
CXR Limited |  |
Contingent Acquisition Obligations |  |
Maximum amount of contingent consideration |  | $ 36,000

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- Definition Maximum period the entity is required to make the payment after a date under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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