Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Comprehensive Loss
Amounts reclassified from other comprehensive income	$ 0	$ 0
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	2,590	2,668
Other comprehensive income before reclassifications	26	2
Net current-period other comprehensive income	26	2
Balance at the end of the period	2,616	2,670
Unrealized Gain on Marketable Securities, net of tax
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	9	82
Other comprehensive income before reclassifications	11	1
Net current-period other comprehensive income	11	1
Balance at the end of the period	20	83
Foreign Currency Items
Changes in accumulated other comprehensive income (loss) by component
Balance at the beginning of the period	2,581	2,586
Other comprehensive income before reclassifications	15	1
Net current-period other comprehensive income	15	1
Balance at the end of the period	$ 2,596	$ 2,587

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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