Summary of Significant Accounting Policies - Accounts receivable (Details) |
Dec. 31, 2019
contract
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Dec. 31, 2019
customer
|
Dec. 31, 2019
USD ($)
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Dec. 31, 2018
USD ($)
customer
|
|---|---|---|---|---|
| Accounts receivable | ||||
| Allowance for doubtful accounts | ||||
| GlaxoSmithKline Intellectual Property Development Ltd | ||||
| Accounts receivable | ||||
| Number of customers | 1 | 1 | 1 |
| X | ||||||||||
- Definition Represents the number of customers. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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