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Collaboration and Licensing Agreements (Tables) | 9 Months Ended
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Sep. 30, 2020
Collaboration and Licensing Agreements |
Schedule of Changes in Deferred Revenue | ​
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ |  | Deferred revenue |
Balance at December 31, 2019 |  | $ | 4,541 |
Increases due to cash received, excluding amounts recognized as revenue during the period | ​ | ​ | — | ​
Decreases due to revenue recognized in the period for which cash has been received | ​ | ​ | (1,828) | ​
Decreases due to revenue recognized in the period for which cash has not been received | ​ | ​ | (1,828) | ​
Balance at September 30, 2020 | ​ | $ | 885 | ​

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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