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Contractual Commitments and Contingencies - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 | Jun. 30, 2016 claim | Aug. 18, 2015 claim | Jul. 10, 2015 claim | Jun. 29, 2015 claim
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Lease expiration period |  |  | 8 years |  |  |  |  |  |
Rent expense | $ | $ 453 | $ 363 | $ 1,311 | $ 956 |  |  |  |  |
Pending Litigation |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of patent challenged grounds |  |  |  |  |  | 4 |  |  |
Pending Litigation | Bone Bank Action |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of patent challenged grounds |  |  |  |  |  |  |  | 5 | 7
Opinion allowing a review of patent |  |  |  |  |  |  |  | 2 |
Pending Litigation | Liventa Action, 701 Patent |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of patent challenged grounds |  |  |  |  |  |  | 6 |  |
Pending Litigation | Liventa Action, 437 Patent |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Number of patent challenged grounds |  |  |  |  |  |  | 7 |  |
Opinion allowing a review of patent |  |  |  |  |  |  | 1 |  |
Sales Revenue, Net | Product Concentration Risk |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Percentage of revenue |  |  |  |  | 12.00% |  |  |  |
Standby Letters of Credit |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Standby letters of credit | $ | $ 103 |  | $ 103 |  |  |  |  |  |

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