Lease Commitments - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) Option	Sep. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating leases, rent expense	$ 200,000	$ 0	$ 400,000	$ 0
Cash payments for operating lease costs			800,000	$ 0
Prepaid Lease Payments
Lessee Lease Description [Line Items]
Cash payments for operating lease costs			$ 600,000
Buffalo Grove, Illinois
Lessee Lease Description [Line Items]
Operating leases, remaining lease terms	4 years 7 months 6 days		4 years 7 months 6 days
Operating lease number of option to extend | Option			1
Operating lease, option to extend description			Both operating leases contain an option to extend the term for one additional five year period
Lessee, operating lease, existence of option to terminate			true
Operating lease, renewal term	5 years		5 years
Florham Park, New Jersey
Lessee Lease Description [Line Items]
Operating leases, remaining lease terms	4 years 10 months 24 days		4 years 10 months 24 days
Operating lease number of option to extend | Option			1
Operating lease, option to extend description			Both operating leases contain an option to extend the term for one additional five year period
Lessee, operating lease, existence of option to terminate			true
Operating lease, renewal term	5 years		5 years