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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
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
| 2016 |  |  | $ | 89,058 |  |  | $ | — |  |  | $ | — |  |  | $ | 89,058 |
| 2015 |  |  | $ | 89,058 |  |  | $ | — |  |  | $ | — |  |  | $ | 89,058 |
Inventory components |
|  | December 31,
|  | 2016 |  | 2015
Raw materials and sub-assemblies |  | $ | 2,665,185 |  |  | $ | 2,521,585 |
Finished goods |  |  | 64,359 |  |  |  | 39,083 |
Inventory reserves |  |  | (1,192,105 | ) |  |  | (1,234,578 | )
Inventory, net |  | $ | 1,537,439 |  |  | $ | 1,326,090 |
Prepaid expenses and other current assets |
|  | December 31,
|  | 2016 |  | 2015
Prepaid insurance |  | $ | 40,307 |  |  | $ | 18,612 |
Prepaid project development costs |  |  | 83,600 |  |  |  | — |
Prepaid inventory purchases |  |  | 43,700 |  |  |  | 2,031 |
Other |  |  | 91,857 |  |  |  | 66,913 |
Prepaid expenses and other current assets |  | $ | 259,464 |  |  | $ | 87,556 |
Major customers as a percentage of net accounts receivable balances |
|  | December 31,
|  | 2016 |  | 2015
Ingram Micro Inc. |  |  | 49 | % |  |  | 35 | %
Bluestar, Inc. |  |  | 30 | % |  |  | 22 | %
ScanSource, Inc. |  |  | * |  |  |  | 17 | %
*Customer accounts for less than 10% of accounts receivable balances
Reserves for product warranty costs |
Year |  | Balance at Beginning of Year |  | Additional Warranty Reserves |  | Amounts Charged to Reserves |  | Balance at End of Year
| 2016 |  |  | $ | 78,871 |  |  | $ | 34,385 |  |  | $ | (34,385 | ) |  | $ | 78,871 |
| 2015 |  |  | $ | 78,871 |  |  | $ | 41,029 |  |  | $ | (41,029 | ) |  | $ | 78,871 |
Net income per share applicable to common stockholders |
|  | Years Ended December 31,
|  | 2016 |  | 2015
Numerator: |  |  |  |
Net income |  | $ | 12,147,088 |  |  | $ | 1,817,672 |
Convertible note interest |  |  | 117,421 |  |  |  | — |
Adjusted diluted net income |  | $ | 12,264,509 |  |  | $ | 1,817,672 |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares outstanding used in computing net income per share: |  |  |  |  |  |  |  |
Basic |  |  | 5,793,245 |  |  |  | 5,554,541 |
Effect of dilutive stock options and convertible notes payable |  |  | 1,026,576 |  |  |  | 351,695 |
Diluted |  |  | 6,819,821 |  |  |  | 5,906,236 |
Net income per share applicable to common stockholders: |  |  |  |  |  |  |  |
Basic |  | $ | 2.10 |  |  | $ | 0.33 |
Diluted |  | $ | 1.80 |  |  | $ | 0.31 |
Revenue by geographic areas |
|  | Years Ended December 31,
Revenues: (in thousands) |  | 2016 |  | 2015
United States |  | $ | 16,851 |  |  | $ | 14,343 |
Europe |  |  | 2,843 |  |  |  | 2,698 |
Asia and rest of world |  |  | 1,094 |  |  |  | 1,359 |
|  | $ | 20,788 |  |  | $ | 18,400 |
Major customers accounted for at least 10% of total revenues |
|  | Years Ended December 31,
|  | 2016 |  | 2015
Ingram Micro Inc. |  |  | 29 | % |  |  | 29 | %
BlueStar, Inc. |  |  | 22 | % |  |  | 22 | %
Scansource, Inc. |  |  | 18 | % |  |  | 18 | %

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