Accounts Payable and Accrued Expenses (Detail) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Account Payable And Accrued Liabilities [Line Items]
Accounts payable	$ 3,632,691	$ 3,786,381
Specialty capitation payable	300,000	547,307
Subcontractor IPA risk pool payable	1,660,366	1,348,376
Professional fees	3,488,386	3,004,215
Deferred revenue	708,591	250,000
Accrued compensation	2,797,859	4,343,341
Accounts payable and accrued liabilities	$ 12,587,893	$ 13,279,620