Commitments and Contingencies (Details)		9 Months Ended
	Sep. 11, 2019 plaintiff	Sep. 30, 2020 shares
Restructuring Cost and Reserve [Line Items]
Options granted (in shares) | shares		2,639,978
Vesting period of shares		3 years
Drachman V. BioDelivery Sciences International, Inc.
Restructuring Cost and Reserve [Line Items]
Number of plaintiffs | plaintiff	2