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