Income taxes (restated) (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Federal Tax [Member]
Operating Loss Carryforwards	$ 19,049
Operating Loss Carryforwards, Expiration Dates	Fiscal 2023
Domestic Tax Authority [Member]
Operating Loss Carryforwards	2,694
Operating Loss Carryforwards, Expiration Dates	Fiscal 2031
Foreign Tax Authority [Member]
Operating Loss Carryforwards	67,617
Operating Loss Carryforwards, Expiration Dates	Indefinite
Federal Capital [Member]
Operating Loss Carryforwards	$ 2,076
Operating Loss Carryforwards, Expiration Dates	Fiscal 2015