Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Schedule of Disaggregated Revenue By Each Payor Type

The following table presents disaggregated revenue generated by each payor type for the three and six months ended June 30, 2019 and 2018:

Three Months Ended June 30,	2019		2018
Commercial	$	25,364,588	$	29,601,757
Medicare	57,964,880		54,776,111
Medicaid	36,276,874		26,959,315
Other third parties	10,443,224		11,329,348
Revenue	$	130,049,566	$	122,666,531

Six Months Ended June 30,	2019		2018
Commercial	$	50,383,600	$	55,366,879
Medicare	95,062,722		107,331,859
Medicaid	61,647,399		62,552,664
Other third parties	18,713,016		21,338,375
Revenue	$	225,806,737	$	246,589,777

Schedule of Contributions to Revenue and Receivables by Payor

The Company had major payors that contributed the following percentage of net revenue:

	For the Three Months Ended June 30,
	2019		2018
Payor A	13.7	%	11.3	%
Payor B	12.6	%	16.6	%
Payor C	10.5	%	11.6	%
Payor D	13.7	%	17.9	%

	For the Six Months Ended June 30,
	2019		2018
Payor A	15.8	%	12.5	%
Payor B	14.3	%	15.7	%
Payor C	11.7	%	13.3	%
Payor D	*%		14.9	%

* Less than 10% of total net revenues

The Company had major payors that contributed to the following percentage of receivables and receivables – related parties before the allowance for doubtful accounts:

	As of June 30, 2019		As of December 31, 2018
Payor E	29.0	%	34.1	%
Payor F	34.0	%	42.2	%

Schedule of Carrying Amounts and Fair Values of Financial Instruments

The carrying amounts and fair values of the Company’s financial instruments as of June 30, 2019 are presented below:

	Fair Value Measurements
	Level 1		Level 2		Level 3		Total
Assets
Money market funds*	$	28,534,501	$	—	$	—	$	28,534,501
Marketable securities – certificates of deposit	1,074,280		—		—		1,074,280
Marketable securities – equity securities	75,548		—		—		75,548
Total	$	29,684,329	$	—	$	—	$	29,684,329

The carrying amounts and fair values of the Company’s financial instruments as of December 31, 2018 are presented below:

	Fair Value Measurements
	Level 1		Level 2		Level 3		Total
Assets
Money market funds*	$	85,500,745	$	—	$	—	$	85,500,745
Marketable securities – certificates of deposit	1,066,103		—		—		1,066,103
Marketable securities – equity securities	60,999		—		—		60,999
Total	$	86,627,847	$	—	$	—	$	86,627,847

*    Included in cash and cash equivalents