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Organization and Description of Business (Tables)
 6 Months Ended
Jun. 30, 2016
Revenue Recognition  
Schedule of Revenue recognized when cash is received and on an accrual basis
Revenue recognized on an accrual basis and when cash is received for the three months ended June 30, 2016 and 2015 was as follows (in thousands of dollars):
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
%
 
2015
 
%
 
2016
 
%
 
2015
 
%
Revenue recognized on an accrual basis
$
9,349

 
64
%
 
$
6,587

 
55
%
 
$
17,575

 
62
%
 
$
11,973

 
52
%
Revenue recognized when cash is received
5,326

 
36
%
 
5,321

 
45
%
 
10,650

 
38
%
 
11,153

 
48
%
Total
$
14,675

 
100
%
 
$
11,908

 
100
%
 
$
28,225

 
100
%
 
$
23,126

 
100
%
Revenue concentration risk | Revenue  
Concentration Risk  
Schedule of the Company's third-party payers as a percentage of total
The Company’s third-party payers in excess of 10% of revenue and their related revenue as a percentage of total revenue were as follows:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2016
 
2015
 
2016
 
2015
Medicare
30
%
 
28
%
 
30
%
 
26
%
United Healthcare
13
%
 
14
%
 
12
%
 
14
%
 
43
%
 
42
%
 
42
%
 
40
%
Gross receivables concentration risk | Accounts receivable  
Concentration Risk  
Schedule of the Company's third-party payers as a percentage of total
The Company’s significant third-party payers and their related accounts receivable balance as a percentage of total accounts receivable were as follows:
 
 
June 30,
2016
 
December 31, 2015
Medicare
42
%
 
31
%
United Healthcare
17
%
 
25
%
Aetna
14
%
 
23
%
Cigna
14
%
 
8
%