Acquisitions (Details 6) - Autoweb [Member] $ in Thousands	Dec. 31, 2015 USD ($)
Consideration transferred
Consideration transferred	$ 27,826
Series B Preferred Stock [Member]
Consideration transferred
Consideration transferred	20,989
Series B Preferred Warrants [Member]
Consideration transferred
Consideration transferred	2,542
Cash [Member]
Consideration transferred
Consideration transferred	279
Fair Value Of Prior Ownership [Member]
Consideration transferred
Consideration transferred	$ 4,016