Auto Data, Inc. (Narrative) (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Auto Data, Inc. [Abstract]
Purchase price earn-out percent based on segment contracts	3.00%
Period of purchase price earn out payments (in years)	5 years
Purchase price earn-out as percent of segment contracts with continued occupancy of building	4.00%
Amount due from ADI due to earn-out	$ 3,000		$ 0
Other income under the earn out agreement	$ 3,000	$ 3,000