Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Represents the maximum potential compensation expenses to be recognized under long-term retention program and cash bonus awards.

+ References

No definition available.

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- Definition

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Commitments and Contingencies - Performance-Contingent Awards (Details) - Long-Term Retention and Incentive Cash Bonus Awards - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee
Commitments and Contingencies
Service-based vesting period				5 years
First tranche
Commitments and Contingencies
Cash bonus awards recognized		$ 3.5	$ 9.5
Second tranche
Commitments and Contingencies
Cash bonus awards recognized	$ 2.4	$ 1.9	$ 8.7
Maximum potential of compensation expenses	0.5
Second tranche \| Research and development
Commitments and Contingencies
Maximum potential of compensation expenses	0.4
Second tranche \| Selling, general and administrative
Commitments and Contingencies
Maximum potential of compensation expenses	0.1
Second and Third tranche \| Employee
Commitments and Contingencies
Cash bonus awards recognized	0.5
Third tranche
Commitments and Contingencies
Cash bonus awards recognized	11.8
Maximum potential of compensation expenses	3.5
Third tranche \| Research and development
Commitments and Contingencies
Maximum potential of compensation expenses	2.7
Third tranche \| Selling, general and administrative
Commitments and Contingencies
Maximum potential of compensation expenses	$ 0.8