Marketable Securities - Schedule of Maturities of Marketable Securities (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Investments, Debt and Equity Securities [Abstract]
Amortized cost Due within one year	$ 7,129
Amortized cost Due after one year through five years	19,045
Amortized cost Due after five years through ten years	975
Amortized cost Total available-for-sale securities	27,149
Estimated fair value Due within one year	7,141
Estimated fair value Due after one year through five years	19,287
Estimated fair value Due after five years through ten years	1,000
Estimated fair value Total available-for-sale securities	$ 27,428