Related Party Transactions	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	11. Related Party Transactions For each of the years ended December 31, 2017 and 2016, the Company incurred costs of less than $0.1 million, respectively, to Foster Management Company and HealthpointCapital, LLC for travel and administrative expenses. John H. Foster, who was one of the Company's directors until March 2, 2016 is a significant equity holder of HealthpointCapital, LLC, an affiliate of HealthpointCapital Partners, L.P. and HealthpointCapital Partners II, L.P., which are the Company’s principal stockholders. As of December 31, 2016, the Company also had a liability of less than $0.1 million payable to HealthpointCapital, LLC for travel and administrative expenses. There was no outstanding receivable or payable balance with HealhpointCapital as of December 31, 2017. In July 2016, the Company entered into a forbearance agreement with HealthpointCapital, LLC, HealthpointCapital Partners, L.P., and HealthpointCapital Partners II, L.P. (collectively, "HealthpointCapital"), pursuant to which HealthpointCapital, on behalf of the Company, paid $1.0 million of the $1.1 million payment due and payable by the Company to Orthotec on July 1, 2016 and agreed to not exercise its contractual rights to seek an immediate repayment of such amount. Pursuant to this forbearance agreement, the Company repaid this amount in September 2016. The Company and HealthpointCapital entered into an agreement for joint payment of settlement whereby HealthpointCapital has agreed to contribute $5 million to the $49 million settlement amount. Certain of the Company’s board of directors and senior management participated in the March 2017 Private Placement (Note 8). Indemnification Agreements The Company has entered into indemnification agreements with certain of its directors, which are named defendants in the Orthotec litigation matter in New York (See Note 7). The indemnification agreements require the Company to indemnify these individuals to the fullest extent permitted by applicable law and to advance expenses incurred by them in connection with any proceeding against them with respect to which they may be entitled to indemnification by the Company. For the years ended December 31, 2017 and 2016, the Company paid less than $0.1 million in each year in connection with the indemnification obligations of Scient’x and Surgiview, all of which was related to the Orthotec matter. (See Note 7).

11. Related Party Transactions

For each of the years ended December 31, 2017 and 2016, the Company incurred costs of less than $0.1 million, respectively, to Foster Management Company and HealthpointCapital, LLC for travel and administrative expenses. John H. Foster, who was one of the Company's directors until March 2, 2016 is a significant equity holder of HealthpointCapital, LLC, an affiliate of HealthpointCapital Partners, L.P. and HealthpointCapital Partners II, L.P., which are the Company’s principal stockholders. As of December 31, 2016, the Company also had a liability of less than $0.1 million payable to HealthpointCapital, LLC for travel and administrative expenses. There was no outstanding receivable or payable balance with HealhpointCapital as of December 31, 2017.

In July 2016, the Company entered into a forbearance agreement with HealthpointCapital, LLC, HealthpointCapital Partners, L.P., and HealthpointCapital Partners II, L.P. (collectively, "HealthpointCapital"), pursuant to which HealthpointCapital, on behalf of the Company, paid $1.0 million of the $1.1 million payment due and payable by the Company to Orthotec on July 1, 2016 and agreed to not exercise its contractual rights to seek an immediate repayment of such amount. Pursuant to this forbearance agreement, the Company repaid this amount in September 2016. The Company and HealthpointCapital entered into an agreement for joint payment of settlement whereby HealthpointCapital has agreed to contribute $5 million to the $49 million settlement amount.

Certain of the Company’s board of directors and senior management participated in the March 2017 Private Placement (Note 8).

Indemnification Agreements

The Company has entered into indemnification agreements with certain of its directors, which are named defendants in the Orthotec litigation matter in New York (See Note 7). The indemnification agreements require the Company to indemnify these individuals to the fullest extent permitted by applicable law and to advance expenses incurred by them in connection with any proceeding against them with respect to which they may be entitled to indemnification by the Company. For the years ended December 31, 2017 and 2016, the Company paid less than $0.1 million in each year in connection with the indemnification obligations of Scient’x and Surgiview, all of which was related to the Orthotec matter. (See Note 7).