Subsequent Events	9 Months Ended
Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Event On November 2, 2015, the Company entered into a first amendment (the "First Amendment") to the collaboration agreement with Elite Medical Holdings, LLC and Pac 3 Surgical Products, LLC (the "Collaborators") (the "Collaboration Agreement"). Under the Collaboration Agreement, the Collaborators agreed to provide services related to the development and commercialization of the Company’s current products and products in the Company’s product pipeline. As consideration for the services, the Collaboration Agreement provides that the Company will issue an aggregate $8.0 million of the Company’s common stock, based on a per share price of $1.95 per share, which was the average of the closing price of the Company’s common stock on The NASDAQ Global Select Market on each of the four days prior to the effective date and the effective of the Collaboration Agreement. Pursuant to the First Amendment, in exchange for a "lock up" restriction on selling or transferring each tranche of shares issued to the Collaborators and a maximum value cap (as discussed below), the Company has agreed to make a cash payment to the Collaborators in the event that the shares in such tranche do not have a minimum amount of value based on the market value of the Company’s common stock at the end of the lock up period applicable to such tranche of shares. In addition, in the event that at the end of a lock up period the value of a tranche of shares issued to the Collaborators exceeds a certain amount, the Collaborators have agreed to forfeit shares back to the Company, so as to limit the maximum amount of value derived from such shares at the end of a lock up period. Pursuant to the First Amendment, the shares issued to the Collaborators in each of 2014, 2015 and 2016 are subject to a lock up that lasts until the first quarter of 2017, 2018 and 2019, respectively. The valuation of each tranche of shares occurs at the end of the applicable lock up period. Based on the closing price of the Company’s common stock on October 30, 2015, the Company could have an additional liability of $3.5 million for shares of the Company’s common stock previously issued under the Collaboration Agreement, with $2.1 million payable in 2017 and $1.4 million million payable in 2018. In addition, based on the closing price of the Company’s common stock on October 30, 2015, the Company could have an additional liability of $2.8 million for shares of the Company’s common stock issuable under the remaining terms of the Collaboration Agreement (assuming that all of the shares issuable under the Collaboration Agreement are issued), with $0.7 million payable in 2018 (in addition to the amount above payable in 2018), and $2.1 million payable in 2019. If the Collaborators elect to sell, assign or transfer: (i) more than 20% of the shares issued to the Collaborators prior to the first valuation date; or (ii) any of the Collaborator shares still subject to a lockup after the first valuation date, all of the aforementioned restrictions on transfer and valuation minimums and maximums are null and void. Other than as set forth in the First Amendment, the Collaboration Agreement remains in full force and effect.

Subsequent Event

On November 2, 2015, the Company entered into a first amendment (the "First Amendment") to the collaboration agreement with Elite Medical Holdings, LLC and Pac 3 Surgical Products, LLC (the "Collaborators") (the "Collaboration Agreement"). Under the Collaboration Agreement, the Collaborators agreed to provide services related to the development and commercialization of the Company’s current products and products in the Company’s product pipeline. As consideration for the services, the Collaboration Agreement provides that the Company will issue an aggregate $8.0 million of the Company’s common stock, based on a per share price of $1.95 per share, which was the average of the closing price of the Company’s common stock on The NASDAQ Global Select Market on each of the four days prior to the effective date and the effective of the Collaboration Agreement. Pursuant to the First Amendment, in exchange for a "lock up" restriction on selling or transferring each tranche of shares issued to the Collaborators and a maximum value cap (as discussed below), the Company has agreed to make a cash payment to the Collaborators in the event that the shares in such tranche do not have a minimum amount of value based on the market value of the Company’s common stock at the end of the lock up period applicable to such tranche of shares. In addition, in the event that at the end of a lock up period the value of a tranche of shares issued to the Collaborators exceeds a certain amount, the Collaborators have agreed to forfeit shares back to the Company, so as to limit the maximum amount of value derived from such shares at the end of a lock up period. Pursuant to the First Amendment, the shares issued to the Collaborators in each of 2014, 2015 and 2016 are subject to a lock up that lasts until the first quarter of 2017, 2018 and 2019, respectively. The valuation of each tranche of shares occurs at the end of the applicable lock up period. Based on the closing price of the Company’s common stock on October 30, 2015, the Company could have an additional liability of $3.5 million for shares of the Company’s common stock previously issued under the Collaboration Agreement, with $2.1 million payable in 2017 and $1.4 million million payable in 2018. In addition, based on the closing price of the Company’s common stock on October 30, 2015, the Company could have an additional liability of $2.8 million for shares of the Company’s common stock issuable under the remaining terms of the Collaboration Agreement (assuming that all of the shares issuable under the Collaboration Agreement are issued), with $0.7 million payable in 2018 (in addition to the amount above payable in 2018), and $2.1 million payable in 2019. If the Collaborators elect to sell, assign or transfer: (i) more than 20% of the shares issued to the Collaborators prior to the first valuation date; or (ii) any of the Collaborator shares still subject to a lockup after the first valuation date, all of the aforementioned restrictions on transfer and valuation minimums and maximums are null and void. Other than as set forth in the First Amendment, the Collaboration Agreement remains in full force and effect.