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Significant Accounting Policies (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Dec. 31, 2012 | Jun. 30, 2013 Patents [Member] | Jun. 30, 2012 Patents [Member]
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Intangible assets, net of accumulated amortization |  |  |  |  | $ 343,000 | $ 0
Accounts Receivable [Abstract] |  |  |  |  |  |
Allowance for doubtful accounts | 44,000 |  | 44,000 | 49,000 |  |
Provision for doubtful accounts |  |  | 27,000 |  |  |
Accounts receivable charge-offs |  | 0 | 32,000 |  |  |
Revenue Recognition [Abstract] |  |  |  |  |  |
Net sales returns provision | 281,000 | 107,000 | 471,000 | 146,000 |  |
Provision charges | $ 231,000 | $ 26,000 | $ 397,000 | $ 26,000 |  |

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