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Thyroid Cytopathology Partners (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Thyroid Cytopathology Partners |  |  |  |  |
Outstanding obligations | $ 3,161 |  | $ 3,161 |  | $ 2,424
Thyroid Cytopathology Partners |  |  |  |  |
Thyroid Cytopathology Partners |  |  |  |  |
Notice of intent not to renew period | 12 months |  |  |  |
Expenses for cytopathology testing and evaluation services | $ 1,200 | $ 1,300 | 3,600 | $ 3,800 |
Outstanding obligations | 395 |  | 395 |  | $ 426
Reduction to rent expense for TCP's portion of costs for subleased space | $ 25 | $ 24 | $ 78 | $ 70 |

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