Net loss per share (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share Reconciliation [Abstract]
Numerator - basic and diluted net loss	$ (2,056)	$ (1,730)
Weighted average common shares outstanding, basic and diluted	232,560	225,875
Net loss per share - bacis and diluted	$ (0.01)	$ (0.01)