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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 |

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