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.

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Name:	us-gaap_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Commitments - License agreements (Details)	3 Months Ended		9 Months Ended
Commitments - License agreements (Details)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) company	Sep. 30, 2019 USD ($)
Commitments
Milestone Payment \| $	$ 0	$ 600,000	$ 750,000	$ 600,000
License agreements
Commitments
Number of biotechnology companies where Company has licensed intellectual property \| company			3