Quarterly report pursuant to Section 13 or 15(d)

Disaggregation of Revenue (Detail)

v3.8.0.1
Disaggregation of Revenue (Detail) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenue $ 124,166,727 $ 85,336,062
Commercial [Member]    
Revenue 105,350,102 83,848,918
Medicare [Member]    
Revenue 18,541,115 1,453,703
Medicaid [Member]    
Revenue 176,350 0
Other third parties [Member]    
Revenue $ 99,160 $ 33,441