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Organization and Description of Business (Tables) | 9 Months Ended
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Sep. 30, 2017
Revenue Recognition |
Schedule of Revenue recognized when cash is received and on an accrual basis | Revenue recognized for the three and nine months ended September 30, 2017 and 2016 was as follows (in thousands of dollars):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2017 |  | % |  | 2016 |  | % |  | 2017 |  | % |  | 2016 |  | %
Revenue recognized on the accrual basis | $ | 17,257 |  |  | 99 | % |  | $ | 13,903 |  |  | 75 | % |  | $ | 50,007 |  |  | 96 | % |  | $ | 31,478 |  |  | 67 | %
Revenue recognized on the cash basis | 262 |  |  | 1 | % |  | 4,700 |  |  | 25 | % |  | 2,350 |  |  | 4 | % |  | 15,350 |  |  | 33 | %
Total | $ | 17,519 |  |  | 100 | % |  | $ | 18,603 |  |  | 100 | % |  | $ | 52,357 |  |  | 100 | % |  | $ | 46,828 |  |  | 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 September 30, |  | Nine Months Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Medicare | 26 | % |  | 23 | % |  | 26 | % |  | 27 | %
UnitedHealthcare | 14 | % |  | 11 | % |  | 14 | % |  | 12 | %
| 40 | % |  | 34 | % |  | 40 | % |  | 39 | %
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:
| September 30, 2017 |  | December 31, 2016
Medicare | 17 | % |  | 18 | %

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