Net loss per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share Reconciliation [Abstract]
Net Income (Loss) Attributable to Parent	$ (1,095)	$ (1,362)	$ (2,663)	$ (3,768)
Denominator-basic or diluted weighted average number of common shares outstanding	222,474	191,229	222,260	191,267
Net loss per share - bacis and diluted	$ (0.01)	$ (0.01)	$ (0.01)	$ (0.02)