Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Detail of comprehensive income loss
Beginning balance, Unrealized gains and losses on available-for sale securities	$ 17
Beginning balance, Foreign currency items	101
Beginning balance	118
Other comprehensive income (loss) before reclassifications, Unrealized gains and losses on available for sale securities	(9)
Other comprehensive income (loss) before reclassifications, Foreign currency items	0
Other comprehensive income (loss) before reclassifications, Total	(9)
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	(9)	(2)	54
Net current period other comprehensive income (loss), Foreign currency items	0
Total other comprehensive income (loss)	(9)	(2)	54
Ending balance, Unrealized gains and losses on available-for sale securities	8	17
Ending balance, Foreign currency items	101	101
Ending Balance	$ 109	$ 118