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Geographical Sales (Detail) - Schedule of sales by geographic region (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011 | Dec. 31, 2010
Sales | $ 19,204,877 |  | $ 11,187,474 |  | $ 46,351,192 |  | $ 26,079,694 |  | $ 43,162,026 | $ 28,818,982
North America [Member] |  |  |  |  |  |  |  |  |  |
Sales | 7,822,570 |  | 5,058,940 |  | 18,282,841 |  | 8,836,430 |  | 19,140,472 | 2,933,829
Europe [Member] |  |  |  |  |  |  |  |  |  |
Sales | 4,868,838 |  | 2,631,431 |  | 11,747,812 |  | 7,540,789 |  | 10,743,066 | 14,059,678
China [Member] |  |  |  |  |  |  |  |  |  |
Sales | 5,016,574 | [1] | 2,685,583 | [1] | 12,621,420 | [1] | 7,639,488 | [1] | 10,320,513 | 8,349,254
Australia [Member] |  |  |  |  |  |  |  |  |  |
Sales | 238,139 |  | 283,540 |  | 522,507 |  | 590,796 |  | 837,684 | 1,064,426
Other Countries [Member] |  |  |  |  |  |  |  |  |  |
Sales | 830,954 |  | 201,431 |  | 1,835,949 |  | 609,627 |  | 765,004 | 274,584
Asia [Member] |  |  |  |  |  |  |  |  |  |
Sales | 322,495 | [2] | 177,949 | [2] | 715,410 | [2] | 485,839 | [2] | 713,683 | 1,266,273
Hong Kong [Member] |  |  |  |  |  |  |  |  |  |
Sales | $ 105,307 |  | $ 148,600 |  | $ 625,253 |  | $ 376,725 |  | $ 641,604 | $ 870,938
[1] | excluding Hong Kong
[2] | excluding China

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
Name: | us-gaap_SalesRevenueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration