Revenue Disaggregation (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Reconciliation of disaggregated revenue with reportable segment

The table below includes a reconciliation of disaggregated revenue with the Company’s reportable segment:

	Year Ended December 31,
	2018						2017						2016
	Implant-based		Shipment-based		Total		Implant-based		Shipment-based		Total		Implant-based		Shipment-based		Total
United States	$	106,014	$	3,079	$	109,093	$	120,572	$	2,637	$	123,209	$	133,734	$	2,377	$	136,111
International	21,097		26,283		47,380		23,246		34,702		57,948		26,884		29,930		56,814
Total Revenue	$	127,111	$	29,362	$	156,473	$	143,818	$	37,339	$	181,157	$	160,618	$	32,307	$	192,925