Net loss per share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share Reconciliation [Abstract]
Net Income (Loss) Attributable to Parent	$ (1,850)	$ (1,095)	$ (3,525)	$ (2,663)
Denominator-basic or diluted weighted average number of common shares outstanding	225,824	222,474	225,803	222,260
Net loss per share - bacis and diluted	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.01)