Transactions With Related Parties	12 Months Ended
Transactions With Related Parties	Dec. 31, 2015
Transactions With Related Parties [Abstract]
Transactions With Related Parties	18. Transactions with Related Parties A member of the Company’s Board of Directors and a shareholder of the Company is an employee of an investment banking services company. The Company made stock repurchases of zero, $5.6 million, and $321,000 in 2015, 2014, and 2013, respectively, which includes the cost of stock and commissions of less than 1% to that investment banking services company. A member of the Company’s Board of Directors and a shareholder of the Company was the former Chief of Thoracic Surgery of a university hospital that generated product and preservation services revenues of $329,000, $273,000, and $353,000 for the Company in 2015, 2014, and 2013, respectively. Additionally, the son of this member of the Company’s Board of Directors receives a retainer for performing heart and lung transplants from a medical center that generated product and preservation services revenues of $617,000, $616,000, and $345,000 for the Company in 2015, 2014, and 2013, respectively. The Company expensed $35,000, $45,000, and $47,000 in 2015, 2014, and 2013, respectively, relating to supplies for clinical trials purchased from a company whose Chief Financial Officer is a member of the Company's Board of Directors and a shareholder of the Company.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.