Consolidated Statements of Stockholders' Equity and Comprehensive Income (Loss) (Parenthetical) (Common Class A, Common Stock, USD $)	6 Months Ended
	Jun. 30, 2011
Common Class A | Common Stock
Warrants exercised, Lower range	$ 0.55
Warrants exercised, Upper range	$ 1.155
Employee stock options exercised, Lower range	$ 0.50
Employee stock options exercised, Upper range	$ 3.54
Cashless exercise of warrants, Lower range	$ 0.40
Cashless exercise of warrants, Upper range	$ 0.90
Issuance of Class A Common Stock pursuant to the Wave Employee Stock Purchase Plan	$ 2.329