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Description of Business and Summary of Significant Accounting Policies (Details 4) (USD $)
Share data in Thousands, unless otherwise specified
|
12 Months Ended |
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Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
| Numerator: |
|
|
|
| Net income (loss) |
$ 3,503,000 |
$ (3,723,000) |
$ (3,885,000) |
| Denominator: |
|
|
|
| Weighted average common stock outstanding for basic net income (loss) per common share (in shares) |
10,609 |
2,360 |
1,923 |
| Effect of dilutive securities-stock options, convertible preferred stock, and warrants to purchase common stock and preferred stock (in shares) |
11,654 |
|
|
| Weighted average common shares and dilutive securities outstanding |
22,263 |
2,360 |
1,923 |
| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share |
|
|
|
| Total (in shares) |
357 |
20,346 |
19,914 |
| Changes in the allowance for doubtful accounts |
|
|
|
| Balance at beginning of period |
643,000 |
651,000 |
619,000 |
| Provision |
159,000 |
184,000 |
283,000 |
| Deductions |
(197,000) |
(192,000) |
(251,000) |
| Balance at end of period |
605,000 |
643,000 |
651,000 |
| Inventories |
|
|
|
| Inventory write-downs |
2,300,000 |
1,500,000 |
1,300,000 |
| Anticipated loss on firm purchase commitments for components |
|
1,800,000 |
|
| Gain related to inventory purchase commitments |
$ 380,000 |
$ (1,840,000) |
|
|
Convertible preferred stock
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|
|
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| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share |
|
|
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| Total (in shares) |
|
15,294 |
15,257 |
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Options to purchase common stock
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|
|
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| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share |
|
|
|
| Total (in shares) |
356 |
4,317 |
3,953 |
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Warrants to purchase common stock
|
|
|
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| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share |
|
|
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| Total (in shares) |
1 |
541 |
510 |
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Warrants to purchase preferred stock
|
|
|
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| Anti-dilutive weighted-average common stock equivalents excluded from the calculation of diluted net income (loss) per share |
|
|
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| Total (in shares) |
|
194 |
194 |