Net loss per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share Reconciliation [Abstract]
Net Income (Loss) Attributable to Parent	$ (1,430)	$ (1,172)	$ (4,954)	$ (3,835)
Denominator-basic or diluted weighted average number of common shares outstanding	225,824	224,492	225,810	222,198
Net loss per share - basic and diluted	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)