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Organization and Description of Business - Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Revenue Recognition |  |  |  |  |
Revenue recognized when cash is received | $ 17,257 | $ 13,903 |  | $ 50,007 | $ 31,478
Revenue recognized on accrual basis, percentage | 99.00% | 75.00% |  | 96.00% | 67.00%
Revenue recognized on an accrual basis | $ 262 | $ 4,700 |  | $ 2,350 | $ 15,350
Revenue recognized received in cash, percentage | 1.00% | 25.00% |  | 4.00% | 33.00%
Total | $ 17,519 | $ 18,603 |  | $ 52,357 | $ 46,828
Revenue, percent | 100.00% | 100.00% |  | 100.00% | 100.00%
Accrued Income Receivable |  |  |  |  |
Revenue Recognition |  |  |  |  |
Total |  | $ 3,500 | $ 1,000 |  |
Afirma Gene Expression Classifier | Maximum |  |  |  |  |
Revenue Recognition |  |  |  |  |
Revenue recognized on accrual basis, percentage |  |  |  |  | 50.00%

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