Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue Recognition [Abstract]
Minimum number of days in the payment terms to consider revenue not to be fixed or determinable			90 days
Revenue recognition, gift cards, breakage (in hundredths)	1.00%	1.00%	1.00%	1.00%
Refund period for channel partners, minimum			5 days
Refund period for channel partners, maximum			14 days
Refund period for non channel partners, maximum			5 days
Refund period for guarantee			30 days