Supplemental Disclosure of Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
Supplemental disclosure of cash flows activities
Cash paid for income taxes		$ 147	$ 108
Cash paid for interest expense		127	169
Supplemental disclosure of non-cash investing activities
Common stock issued in connection with the acquisition of Transpera, Inc.			863
Supplemental disclosure of non-cash financing activities
Common stock issued in connection with the conversion of preferred stock		162,657
Common stock issued in connection with the Series F preferred stock deemed dividend	15,849	15,849
Reclassification of liability warrants to equity warrants		$ 790