Summary of Significant Accounting Policies - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 segment	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounting Policies [Abstract]
Letter of credit				$ 200,000
Restricted cash	200,000	200,000
Allowance for doubtful accounts	2,000	127,000
Concentration Risk [Line Items]
Advertising expense	522,000	1,180,000	1,123,000
Capitalized advertising	159,000	26,000
Foreign currency gains (losses)	$ (68,000)	$ (86,000)	$ (111,000)
Number of operating segments	1
Customer One [Member] | Sales Revenue, Product Line [Member]
Concentration Risk [Line Items]
Concentration risk	36.10%
Customer Two [Member] | Sales Revenue, Product Line [Member]
Concentration Risk [Line Items]
Concentration risk	35.50%
Customer One And Two [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk	71.80%