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Financial Instruments and Marketable Securities - Future Maturities of Available-For-Sale Securities (Details) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2014
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Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale securities, Amortized Cost, Maturities Less than 12 Months | $ 197
Available-for-sale securities, Fair Value, Maturities Less than 12 Months | 453
Available-for-sale securities, Amortized Cost, Maturities Greater than 12 Months | 0
Available-for-sale securities, Fair Value, Maturities Greater than 12 Months | 0
Common stock [Member] |
Schedule of Available-for-sale Securities [Line Items] |
Available-for-sale securities, Amortized Cost, Maturities Less than 12 Months | 197
Available-for-sale securities, Fair Value, Maturities Less than 12 Months | 453
Available-for-sale securities, Amortized Cost, Maturities Greater than 12 Months | 0
Available-for-sale securities, Fair Value, Maturities Greater than 12 Months | $ 0

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