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Fair Value - Rollforward of the Fair Value of the Assets Determined using Level 3 Inputs (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs
Balance at the beginning of the period	$ 66,897
Payments received from contingent consideration	(10,000)
Impairment of corporate debt security	(492)
Balance at the end of the period	34,353
Corporate Debt Security
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs
Purchase of corporate debt security	1,953
Change In The Fair Value Of Contingent Consideration
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs
Change in the fair value	(22,800)
Warrants
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs
Change in the fair value	1,837
Proceeds from the sale of shares acquired	(3,000)
Exercise of Warrants
Roll forward of the fair value of the Company's investments whose fair value was determined using Level 3 inputs
Proceeds from the sale of shares acquired	$ (3,042)

X

- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis asset impairment of corporate debt security.

+ References

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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- Definition

Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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