Net loss per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share Reconciliation [Abstract]
Net Income (Loss) Attributable to Parent	$ (1,172)	$ (1,167)	$ (3,835)	$ (4,935)
Denominator-basic or diluted weighted average number of common shares outstanding	224,492	191,229	222,198	191,254
Net loss per share - bacis and diluted	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.03)