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License Agreement - Beijing (Details) - USD ($) $ in Thousands		9 Months Ended
	Jul. 23, 2019	Sep. 30, 2020
License Agreements
Minimum expected period to begin future installment payment	1 year
Maximum
License Agreements
Clinical supply agreement execution period from effective date	12 months
License Agreement with Beijing SL
License Agreements
Revenue recognized from the agreement		$ 0
Upfront payment to be received	$ 2,500
Period from effective date within which upfront gross payment to be paid	45 days
Developmental and regulatory milestone payment eligible to be received	$ 6,000
Global net sales milestone payment to be received	$ 20,000
License Agreement with Beijing SL | Maximum
License Agreements
Percentage of royalty on net sales	20.00%

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The percentage of royalty to be paid on net sales.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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