Quarterly report pursuant to Section 13 or 15(d)

Eliminated Upon Consolidation Included In Accompanying Consolidated Balance Sheets (Detail)

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Eliminated Upon Consolidation Included In Accompanying Consolidated Balance Sheets (Detail) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Current assets        
Cash and cash equivalents $ 103,731,761 $ 99,749,199 $ 63,251,651  
Restricted cash - short-term 18,028,116 18,005,661 0  
Investment in marketable securities 1,138,477 1,143,095    
Receivables, net 52,805,123 20,117,304    
Prepaid expenses and other current assets 3,525,437 3,126,866    
Total current assets 180,615,388 144,159,562    
Noncurrent assets        
Land, property and equipment, net 13,700,034 13,814,306    
Intangible assets, net 99,138,657 103,533,558    
Goodwill 188,933,191 189,847,202    
Loans receivable - related parties 5,000,000 5,000,000    
Loan receivable 10,000,000 10,000,000    
Investments in other entities - equity method 21,875,500 21,903,524    
Restricted cash - long-term 745,293 745,235 $ 101,132  
Other assets 1,585,850 1,632,406    
Total noncurrent assets 340,978,525 346,476,231    
Total assets 521,593,913 490,635,793    
Current liabilities        
Accounts payable and accrued expenses 12,110,530 13,279,620    
Fiduciary accounts payable 1,386,474 2,017,437    
Medical liabilities 69,110,826 63,972,318   $ 18,957,465
Bank loan, short-term 394,783 510,391    
Capital lease obligations 99,480 98,738    
Total current liabilities 110,616,762 109,601,999    
Noncurrent liabilities        
Deferred tax liability 30,055,819 24,916,598    
Liability for unissued equity shares 1,185,025 1,185,025    
Capital lease obligations, net of current portion 593,852 619,001    
Total noncurrent liabilities 49,834,696 44,720,624    
Total liabilities 160,451,458 154,322,623    
Variable Interest Entity, Primary Beneficiary [Member]        
Current assets        
Cash and cash equivalents 58,024,188 54,686,370    
Restricted cash - short-term 18,028,116 18,005,661    
Fiduciary cash 1,386,474 2,017,437    
Investment in marketable securities 1,061,022 1,057,090    
Receivables, net 38,844,184 15,183,483    
Prepaid expenses and other current assets 1,960,737 1,821,328    
Total current assets 119,304,721 92,771,369    
Noncurrent assets        
Land, property and equipment, net 10,201,045 10,167,689    
Intangible assets, net 67,670,837 70,841,907    
Goodwill 60,012,316 60,012,316    
Loans receivable - related parties 5,000,000 5,000,000    
Loan receivable 5,000,000 5,000,000    
Investments in other entities - equity method 21,875,500 21,903,524    
Investments in other entities - cost method 4,320,000 4,320,000    
Restricted cash - long-term 745,293 745,235    
Other assets 1,155,114 1,371,664    
Total noncurrent assets 175,980,105 179,362,335    
Total assets 295,284,826 272,133,704    
Current liabilities        
Accounts payable and accrued expenses 3,505,047 3,625,610    
Incentives payable 14,900,000 21,500,000    
Fiduciary accounts payable 1,386,474 2,017,437    
Medical liabilities 25,212,116 25,186,240    
Income taxes payable 3,229,058 1,463,540    
Amount due to affiliate 28,061,953 24,889,717    
Bank loan, short-term 394,783 510,391    
Capital lease obligations 99,480 98,738    
Total current liabilities 76,788,911 79,291,673    
Noncurrent liabilities        
Deferred tax liability 27,406,818 20,970,766    
Liability for unissued equity shares 1,185,025 1,185,025    
Capital lease obligations, net of current portion 593,852 619,001    
Total noncurrent liabilities 29,185,695 22,774,792    
Total liabilities $ 105,974,606 $ 102,066,465