Organization and Summary of Significant Accounting Policies, Revenue Recognition (Details)	12 Months Ended
	Dec. 31, 2014 Type	Dec. 31, 2013	Dec. 31, 2012
Revenue by Type [Line Items]
Number of types of offerings	4
Payment terms, maximum	90 days
Services breakage revenue (in hundredths)	1.00%	1.00%	1.00%
Channel Sales [Member] | Minimum [Member]
Revenue by Type [Line Items]
Refund period	5 days
Channel Sales [Member] | Maximum [Member]
Revenue by Type [Line Items]
Refund period	14 days
Referral Programs and Direct Transactions [Member]
Revenue by Type [Line Items]
Refund period	5 days
End User Software Products [Member]
Revenue by Type [Line Items]
Refund period	30 days