Fair Value Measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Money Market Funds [Member]
Cash equivalents:
Total assets at fair value on a recurring basis	$ 100	$ 100
Deferred payments [Member]
Other long-term liabilities:
Total liabilities at fair value on a recurring basis	12,590	3,278
Quoted Prices In Active Markets For Identical Assets/Liabilities (Level 1) [Member] | Money Market Funds [Member]
Cash equivalents:
Total assets at fair value on a recurring basis	100	100
Significant Unobservable Inputs (Level 3) [Member] | Deferred payments [Member]
Other long-term liabilities:
Total liabilities at fair value on a recurring basis	$ 12,590	$ 3,278