Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Details)

Commitments And Contingencies (Details)					1 Months Ended			3 Months Ended		9 Months Ended		39 Months Ended	63 Months Ended
Commitments And Contingencies (Details)	Aug. 28, 2020 USD ($)	Feb. 03, 2020 USD ($)	Sep. 24, 2018 USD ($) therapy	Feb. 16, 2018 unit $ / shares	Aug. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Aug. 31, 2017 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)
Operating Leased Assets [Line Items]
Settlement amount	$ 900,000							$ 900,000		$ 900,000
Total revenue								1,110,794	$ 2,201,232	5,202,423	$ 6,169,543
Potential future regulatory milestone							$ 20,000,000.0
Payment received						$ 2,000,000
Period after public launch to terminate agreement						3 years
Percentage of net present value of royalty payments						75.00%
Karbinal Agreement \| TRIS Pharma
Operating Leased Assets [Line Items]
Minimum quantity required \| unit				70,000
Make whole payment per unit (in dollars per share) \| $ / shares				$ 30
CERC-611
Operating Leased Assets [Line Items]
Potential milestone payment					$ 7,500,000
Potential milestone revenue threshold					750,000,000.0
Potential milestone payment two					12,500,000
Potential milestone revenue threshold two					1,300,000,000
License obligations					1,300,000
License and other revenue
Operating Leased Assets [Line Items]
Total revenue							$ 25,000,000.0	$ 0	$ 100,000	0	100,000
Armistice \| CERC-611
Operating Leased Assets [Line Items]
Installment payment					$ 100,000
Total revenue											$ 100,000
Aevi
Operating Leased Assets [Line Items]
Contingent consideration		$ 6,500,000
Milestone payment		0								0
Aevi \| Milestone One
Operating Leased Assets [Line Items]
Contingent consideration		2,000,000.0
Aevi \| Milestone Two
Operating Leased Assets [Line Items]
Contingent consideration		$ 4,500,000
Ichorion
Operating Leased Assets [Line Items]
Contingent consideration			$ 15,000,000.0
Milestone payment										$ 0
Ichorion \| CERC-801, CERC-802, And CERC-803
Operating Leased Assets [Line Items]
Number of preclinical therapies \| therapy			3
Ichorion \| CERC-913
Operating Leased Assets [Line Items]
Number of preclinical therapies \| therapy			1
Forecast \| Ichorion \| Milestone One
Operating Leased Assets [Line Items]
Milestone payment												$ 6,000,000.0
Forecast \| Ichorion \| Milestone Two
Operating Leased Assets [Line Items]
Milestone payment												$ 5,000,000.0
Forecast \| Ichorion \| Milestone Three
Operating Leased Assets [Line Items]
Milestone payment													$ 4,000,000.0