Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		$ 16,781
Total Unrealized Gains		0
Total Unrealized Losses		(11)
Fair Value	$ 0	16,770
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		6,781
Total Unrealized Gains		0
Total Unrealized Losses		(6)
Fair Value		6,775
Certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Gross Amortized Cost		10,000
Total Unrealized Gains		0
Total Unrealized Losses		(5)
Fair Value		$ 9,995