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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Accounting Policies [Abstract] |
Activities in allowance for doubtful accounts |
Year |  | Balance at Beginning of Year |  | Charged to Costs and Expenses |  | Amounts Written Off |  | Balance at End of Year
| 2012 |  |  | $ | 89,058 |  |  | $ | — |  |  | $ | — |  |  | $ | 89,058 |
| 2011 |  |  | $ | 89,058 |  |  | $ | — |  |  | $ | — |  |  | $ | 89,058 |
| 2010 |  |  | $ | 121,713 |  |  | $ | — |  |  | $ | 32,655 |  |  | $ | 89,058 |
Inventory components |
|  | December 31,
|  | 2012 |  | 2011
Raw materials and sub-assemblies |  | $ | 921,677 |  |  | $ | 1,432,696 |
Finished goods |  |  | 19,390 |  |  |  | 28,356 |
|  | $ | 941,067 |  |  | $ | 1,461,052 |
Major customers as a percentage of net accounts receivable balances |
|  | December 31, |  | December 31,
|  | 2012 |  | 2011
Company A |  |  | 16 | % |  |  | 33 | %
Company B |  |  | 28 | % |  |  | 11 | %
Company C |  |  | 12 | % |  |  | 10 | %
Company D |  |  | 12 | % |  |  | * |
Company E |  |  | 11 | % |  |  | * |
Net loss per share applicable to common stockholders |
|  | Years Ended December 31,
|  | 2012 |  | 2011 |  | 2010
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | (3,298,082 | ) |  | $ | (2,422,361 | ) |  | $ | (3,975,837 | )
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average common shares outstanding used in computing net loss per share: |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  |  | 4,853,630 |  |  |  | 4,360,217 |  |  |  | 3,795,673 |
Net loss per share applicable to common stockholders: |  |  |  |  |  |  |  |  |  |  |  |
Basic and diluted |  | $ | (0.68 | ) |  | $ | (0.56 | ) |  | $ | (1.05 | )
Stock options' weighted average assumptions and grant date fair values |
|  | Years Ended December 31,
|  | 2012 |  | 2011 |  | 2010
Risk-free interest rate (%) |  |  | 1.77 | % |  |  | 3.30 | % |  |  | 3.03 | %
Dividend yield |  |  | — |  |  |  | — |  |  |  | — |
Volatility factor |  |  | 0.7 |  |  |  | 0.6 |  |  |  | 0.9 |
Expected option life (years) |  |  | 4.9 |  |  |  | 5.7 |  |  |  | 4.0 |
Weighted average grant date fair value |  | $ | 0.98 |  |  | $ | 1.08 |  |  | $ | 1.92 |
Stock-based compensation |
|  | Years Ended December 31,
Income Statement Classification |  | 2012 |  | 2011 |  | 2010
Cost of revenues |  | $ | 50,660 |  |  | $ | 61,994 |  |  | $ | 55,607 |
Research and development |  |  | 136,618 |  |  |  | 165,028 |  |  |  | 151,978 |
Sales and marketing |  |  | 128,759 |  |  |  | 177,065 |  |  |  | 196,368 |
General and administrative |  |  | 281,631 |  |  |  | 319,112 |  |  |  | 272,601 |
|  | $ | 597,668 |  |  | $ | 723,199 |  |  | $ | 676,554 |
Revenue by geographic areas |
|  | Years Ended December 31,
Revenues: (in thousands) |  | 2012 |  | 2011 |  | 2010
United States |  | $ | 8,078 |  |  | $ | 11,624 |  |  | $ | 10,205 |
Europe |  |  | 3,554 |  |  |  | 4,092 |  |  |  | 2,742 |
Asia and rest of world |  |  | 1,933 |  |  |  | 1,795 |  |  |  | 551 |
|  | $ | 13,565 |  |  | $ | 17,511 |  |  | $ | 13,498 |
Revenue by product families |
|  | Years Ended December 31,
Revenues: (in thousands) |  | 2012 |  | 2011 |  | 2010
Mobile handheld computer and related product and service |  | $ | 7,186 |  |  | $ | 11,345 |  |  | $ | 9,840 |
Cordless barcode scanning and related product and service |  |  | 5,983 |  |  |  | 5,371 |  |  |  | 2,038 |
Other |  |  | 396 |  |  |  | 795 |  |  |  | 1,620 |
|  | $ | 13,565 |  |  | $ | 17,511 |  |  | $ | 13,498 |
Major customers accounted for at least 10% of total revenues |
|  | Years Ended December 31,
|  | 2012 |  | 2011 |  | 2010
Ingram Micro Inc. |  |  | 17 | % |  |  | 13 | % |  |  | 14 | %
Scansource, Inc. |  |  | 21 | % |  |  | 16 | % |  |  | * |
BlueStar, Inc. |  |  | 10 | % |  |  | * |  |  |  | 11 | %
Epocal, Inc. |  |  | * |  |  |  | 11 | % |  |  | 10 | %
Tech Data Corporation |  |  | * |  |  |  | * |  |  |  | 13 | %
* Customer accounted for less than 10% of total revenues for the period

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