Organization and Summary of Significant Accounting Policies, Segment Information, Revenue by Customer (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 Segment	Dec. 31, 2013	Dec. 31, 2012
Organization and Summary of Significant Accounting Policies [Abstract]
Number of operating segments									1
Revenues from External Customers [Line Items]
Revenue	$ 21,969	$ 22,231	$ 20,178	$ 18,613	$ 24,477	$ 23,359	$ 20,125	$ 20,202	$ 82,991	$ 88,163	$ 71,954
Revenue [Member] | Comcast [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)									64.00%	53.00%	35.00%
Revenue [Member] | Office Depot [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)											12.00%
Revenue [Member] | OfficeMax [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)											12.00%
Revenue [Member] | Staples [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)											10.00%
Revenue [Member] | Office Depot and OfficeMax [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)									16.00%	18.00%
Customers Outside United States [Member] | Maximum [Member]
Revenues from External Customers [Line Items]
Revenues from external customers (in hundredths)									1.00%	1.00%	1.00%