Acquisitions (Details 7) - Autoweb [Member]	Dec. 31, 2015 USD ($)
Assets Acquired (Liabilities Assumed), Net
Total tangible assets acquired	$ 4,456,000
Total liabilities assumed	543,000
Net identifiable assets acquired	3,913,000
Definite-lived intangible assets acquired	17,690,000
Goodwill	5,954,000
Net assets acquired	$ 27,557,000