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401(K) Savings Plan	12 Months Ended
401(K) Savings Plan	Dec. 31, 2015
401(K) Savings Plan [Abstract]
401(K) Savings Plan	(16)401(k) Savings Plan The Company established a 401(k) plan in January 1995 for certain eligible employees. Company contribution to this plan was entirely at the Company’s discretion. On October 1, 2007, the Company enhanced the plan to cover all of its U.S. employees. Under the enhanced provisions of the plan, an employee may contribute up to the statutory limit of his or her salary into the plan. The Company matches employee contributions up to 4% of qualified compensation. The Company’s contribution vests immediately. Company contribution to the plan was $0.3 million for the year ended December 31, 2015 and $0.2 million for both the years ended December 31, 2014 and 2013.