Revenue from Contracts with Customers - Schedule of Collaborative Development Services (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Line Items]
Service revenue	$ 1,777,098	$ 5,404,793	$ 5,965,866	$ 14,403,938
Collaborative Development Services
Disaggregation Of Revenue [Line Items]
Service revenue	$ 76,030	$ 1,093,750	$ 548,135	$ 3,006,022

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details