Deferred Grants (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Amortization of deferred grants
Amortization of property grants	$ 235	$ 253
Amortization of employment grants	18	18
Amortization of deferred grants	$ 253	$ 271