Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Detail of comprehensive income (loss)
Beginning balance, Unrealized Gains and Losses on Available-for Sale Securities	$ 8
Beginning balance, Foreign Currency Items	101
Beginning balance, Total	109
Other comprehensive income (loss) before reclassifications, Unrealized Gains and Losses on Available-for Sale Securities	(3)
Other comprehensive income (loss) before reclassifications, Foreign Currency Items	0
Other comprehensive income (loss) before reclassifications, Total	(3)
Amounts reclassified from accumulated other comprehensive income (loss), Unrealized Gains and Losses on Available-for Sale Securities	0
Amounts reclassified from accumulated other comprehensive income (loss), Foreign Currency Items	0
Amounts reclassified from accumulated other comprehensive income (loss), Total	0
Net current period other comprehensive income (loss), Unrealized Gains and Losses on Available-for Sale Securities	(3)	(19)
Net current period other comprehensive income (loss), Foreign Currency Items	0
Total other comprehensive loss	(3)	(19)
Ending balance, Unrealized Gains and Losses on Available-for Sale Securities	5
Ending balance, Foreign Currency Items	101
Ending Balance, Total	$ 106