Investments in Other Entities (Summarized Balance Sheets and Statements of Income) (Detail) - USD ($)		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
LaSalle Medical Associates IPA [Member]
Assets
Cash and cash equivalents		$ 25,746,368		$ 21,065,105
Receivables, net		2,802,290		2,433,116
Other current assets		2,101,110		1,565,606
Loan receivable		1,250,000		1,250,000
Restricted cash		667,414		662,109
Total assets		32,567,182		26,975,936
Liabilities and Stockholders' Equity
Current liabilities		29,085,975		20,353,337
Stockholders' equity		3,481,207		6,622,599
Total liabilities and stockholders' equity		32,567,182		26,975,936
Statements of Operations
Revenues		177,696,760	$ 147,567,476
Expenses		180,445,655	145,333,637
Net (loss) income		(2,748,895)	2,233,839
Universal Care Inc [Member]
Assets
Cash and cash equivalents		24,217,764		21,872,894
Receivables, net		33,462,584		18,618,760
Other current assets		19,086,431		13,021,520
Other assets		3,396,798		3,754,470
Property and equipment, net		2,347,978		1,576,621
Total assets		82,511,555		58,844,265
Liabilities and Stockholders' Equity
Current liabilities		79,113,015		54,421,532
Other liabilities		15,029,117		10,051,952
Stockholders' equity		(11,630,577)		(5,629,219)
Total liabilities and stockholders' equity		82,511,555		$ 58,844,265
Statements of Operations
Revenues		240,633,955	138,189,092
Expenses		246,765,335	140,664,653
Loss before (benefit) provision for income taxes		(6,131,380)	(2,475,561)
(Benefit) provision for income taxes		(130,023)	896,038
Net (loss) income		(6,001,357)	$ (3,371,599)
Accountable Health Care IPA [Member]
Assets
Cash and cash equivalents		5,420,001
Receivables, net		8,835,000
Other current assets		430,427
Other assets		900,007
Property and equipment, net		156,690
Total assets		15,742,125
Liabilities and Stockholders' Equity
Current liabilities		15,657,807
Other liabilities		18,500,000
Stockholders' equity		(18,415,682)
Total liabilities and stockholders' equity		15,742,125
Statements of Operations
Revenues		72,866,663
Expenses		76,755,686
Loss before (benefit) provision for income taxes		(3,889,023)
(Benefit) provision for income taxes		800
Net (loss) income	[1]	$ (3,889,823)

[1] APC’s allocation of net loss commenced on September 21, 2018.