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Segment Information (Detail) - Geographic Information (USD $)
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3 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
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Oct. 31, 2012
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Jul. 31, 2012
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Apr. 30, 2012
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Jan. 31, 2012
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Oct. 31, 2011
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Jul. 31, 2011
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Apr. 30, 2011
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Jan. 31, 2011
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Oct. 31, 2012
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Oct. 31, 2011
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|
| Net revenue: | ||||||||||
| Revenue,net | $ 350 | $ 249,470 | $ 248,070 | $ 449,195 | $ 448,960 | $ 450,360 | $ 86,915 | $ 16,958 | $ 947,085 | $ 1,003,193 |
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United States [Member]
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||||||||||
| Net revenue: | ||||||||||
| Revenue,net | 4,275 | 101,823 | ||||||||
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Taiwan [Member]
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||||||||||
| Net revenue: | ||||||||||
| Revenue,net | 940,010 | 872,670 | ||||||||
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Other International [Member]
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||||||||||
| Net revenue: | ||||||||||
| Revenue,net | $ 2,800 | $ 28,700 | ||||||||