Leases - Additional Information (Detail)	1 Months Ended	3 Months Ended
	Apr. 30, 2019 USD ($) ft² Option	Dec. 31, 2019 USD ($) ft² Option	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Estimated lease payments			$ 22,385,552
Estimated lease payments		$ 22,104,610
Operating lease cost		500,000
Variable lease cost		200,000
Short-term lease cost		0
Operating lease cash payments		$ 300,000
Weighted-average remaining lease term		8 years 9 months 18 days
Weighted-average discount rate		8.90%
Research Facility in Madison | Wisconsin
Lessee Lease Description [Line Items]
Office space leases, in square feet | ft²		74,000
Operating lease renewal term		5 years
Number of options to renew | Option		2
Operating lease expiration month and year		2029-09
Estimated lease payments		$ 13,300,000
Colorado Owner, LLC | Corporate Headquarters In Pasadena | California
Lessee Lease Description [Line Items]
Lease term	91 months
Office space leases, in square feet | ft²	24,000
Lease payments, commencement date	Sep. 30, 2019
Estimated lease payments	$ 8,800,000
Expected leasehold improvements, net of tenant improvement allowances	$ 3,500,000
Operating lease renewal term	5 years
Number of options to renew | Option	1