Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Class A
Stockholders' equity:
Common stock, par value	$ 0.019	$ 0.019
Common stock, shares authorized	37,500,000	37,500,000
Common stock, shares issued	8,567,330	8,469,242
Common stock, shares outstanding	8,567,330	8,469,242
Class B
Stockholders' equity:
Common stock, par value	$ 0.019	$ 0.019
Common stock, shares authorized	12,500,000	12,500,000
Common stock, shares issued	5,200,000	5,200,000
Common stock, shares outstanding	5,200,000	5,200,000