Balance Sheets and Statements of Operations Details (Interest Expense and Other, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income and Expenses [Abstract]
Interest expense	$ 13	$ 0	$ 0
Foreign exchange losses	305	348	706
Other	(14)	(22)	(31)
Interest expense and other, net	$ 304	$ 326	$ 675

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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The cost of borrowed funds accounted for as interest that was charged against earnings during the period.

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