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Commitments and Contingencies (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Short Term Debt [Line Items]        
Rent expense under the operating leases $ 87 $ 90 $ 261 $ 279
Minimum amount of tangible net worth 1,680   1,680  
Percentage of increase in tangible net worth on base of net income     50.00%  
Percentage of increase in tangible net worth on base of proceeds from future issuances of equity     50.00%  
Registered direct offering of equity securities 1,560   1,560  
Tangible net worth 1,360   1,360  
Current amount below minimum net worth requirements 320   320  
Percentage of ownership interest by outsider 40.00%   40.00%  
Loan and Security Agreement [Member]
        
Short Term Debt [Line Items]        
Line of credit maturity date     Mar. 12, 2014  
Letter of Credit [Member]
        
Short Term Debt [Line Items]        
Revolving line-of-credit borrowing capacity 180   180  
Revolving Credit Facility [Member]
        
Short Term Debt [Line Items]        
Interest rate over prime     1.50%  
Revolving line-of-credit borrowing capacity 1,500   1,500  
Percentage of borrowing base on eligible accounts receivable     75.00%  
Percentage of borrowing base on eligible inventory     50.00%  
Percentage of borrowing base on outstanding foreign exchange contract     10.00%  
Lease Agreement, Letter Of Credit [Member]
        
Short Term Debt [Line Items]        
Letter of credit 180   180  
Vendor, Letter Of Credit [Member]
        
Short Term Debt [Line Items]        
Letter of credit 50   50  
Lease Agreements [Member]
        
Short Term Debt [Line Items]        
Lease space for office and warehouse 19,000   19,000  
Lease expiration date     Jan. 31, 2018  
Leasehold improvement allowance 191   191  
Deferred rent credit balance 60   60  
Canadian Lease Agreements [Member]
        
Short Term Debt [Line Items]        
Lease space for office and warehouse 10,000   10,000  
Lease expiration date     Jun. 30, 2014  
Maximum [Member] | Letter of Credit [Member]
        
Short Term Debt [Line Items]        
Letter of credit $ 240   $ 240