Accounts Payable and Accrued Expenses (Detail) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Account Payable And Accrued Liabilities [Line Items]
Accounts payable	$ 4,270,947	$ 3,786,381
Specialty capitation payable	300,000	547,307
Subcontractor IPA risk pool payable	2,101,597	1,348,376
Professional fees	2,652,095	3,004,215
Accrued compensation	6,832,233	4,343,341
Deferred revenue	250,000	250,000
AIPBP payable to CMS, net (see Note 13)	28,567,933	0
Accounts payable and accrued liabilities	$ 44,974,805	$ 13,279,620