Significant Accounting Policies (Concentration of Credit Risk, Accounts Receivable, and Allowance for Doubtful Accounts) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Concentration Risk [Line Items]
Bad debt expense	$ 30,000	$ 4,000	$ (99,000)
Customer in Bankruptcy [Member]
Concentration Risk [Line Items]
Allowance for Doubtful Accounts Receivable, Recoveries	40,000
Allowance for Doubtful Accounts Receivable, Write-offs	$ 1,800,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	26.00%	36.00%	24.00%
Concentration Risk, Number of Entities Included in Calculation	2	3	2
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	6.00%	6.00%	4.00%