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Organization and Summary of Significant Accounting Policies Trade Accounts Receivable and Allowance for Doubtful Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts [Roll Forward]
Balance at beginning of period	$ 2	$ 20	$ 43
Adjustments to costs and expenses-offs	(5)	(18)	(16)
Write-offs	3	0	(7)
Balance at end of period	$ 0	$ 2	$ 20
Accounts Receivable [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)	10.00%	10.00%
Minimum threshold for reporting concentration risk (in hundredths)	10.00%	10.00%
Accounts Receivable [Member] \| Comcast [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)	78.00%	52.00%
Accounts Receivable [Member] \| Office Depot [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)		10.00%
Accounts Receivable [Member] \| Office Depot and OfficeMax [Member]
Concentration Risk [Line Items]
Customer concentration risk (in hundredths)	12.00%

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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