Short-term Investments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	$ 5,954
Short-term Investments, Unrealized Gains
Short-term Investments, Unrealized Losses	(5)
Short-term Investments, Estimated Fair Value	5,949
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	3,436
Short-term Investments, Unrealized Gains
Short-term Investments, Unrealized Losses	(3)
Short-term Investments, Estimated Fair Value	3,433
Government bonds
Schedule Of Available For Sale Securities [Line Items]
Short-term Investments, Amortized Cost	2,518
Short-term Investments, Unrealized Gains
Short-term Investments, Unrealized Losses	(2)
Short-term Investments, Estimated Fair Value	$ 2,516