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Concentrations Risk of Company's Purchases and Outstanding Accounts Payable Balances (Detail) (USD $)
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3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Concentration Risk [Line Items] | ||||
| Purchases | $ 2,240,098 | $ 3,180,480 | $ 2,735,429 | $ 3,963,709 |
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Major Supplier Concentration Risk
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| Concentration Risk [Line Items] | ||||
| Purchases | 2,056,432 | 2,282,426 | 2,178,770 | 3,730,239 |
| Percentage of purchases | 83.00% | 69.00% | 66.00% | 70.00% |
| Accounts payable | 1,057,216 | 936,005 | 1,057,216 | 936,005 |
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Major Supplier Concentration Risk | Vendors A
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| Concentration Risk [Line Items] | ||||
| Purchases | 1,093,738 | 1,955,098 | 1,216,076 | 3,049,023 |
| Percentage of purchases | 44.00% | 59.00% | 37.00% | 57.00% |
| Accounts payable | 10,495 | 487,231 | 10,495 | 487,231 |
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Major Supplier Concentration Risk | Vendors B
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| Concentration Risk [Line Items] | ||||
| Purchases | 622,756 | 622,756 | ||
| Percentage of purchases | 25.00% | 19.00% | ||
| Accounts payable | 729,293 | 729,293 | ||
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Major Supplier Concentration Risk | Vendors C
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| Concentration Risk [Line Items] | ||||
| Purchases | 339,938 | 339,938 | ||
| Percentage of purchases | 14.00% | 10.00% | ||
| Accounts payable | 317,428 | 317,428 | ||
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Major Supplier Concentration Risk | Vendors D
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| Concentration Risk [Line Items] | ||||
| Purchases | 327,328 | 681,216 | ||
| Percentage of purchases | 10.00% | 13.00% | ||
| Accounts payable | $ 448,774 | $ 448,774 | ||