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Product Revenue by Product Group (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue | $ 21,459,124 | $ 14,055,440 | $ 18,882,277 | $ 13,613,328 | $ 17,725,546 | $ 17,756,000 | $ 15,414,681 | $ 11,060,159 | $ 68,010,169 | $ 61,956,386 | $ 52,735,730
Percent of product revenue | 100.00% |  |  |  | 100.00% |  |  |  | 100.00% | 100.00% | 100.00%
Orthobiologics |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue |  |  |  |  |  |  |  |  | 49,954,112 | 39,858,139 | 30,741,305
Percent of product revenue | 73.50% |  |  |  | 64.30% |  |  |  | 73.50% | 64.30% | 58.30%
Dermal |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue |  |  |  |  |  |  |  |  | 1,384,403 | 3,681,166 | 3,564,616
Percent of product revenue | 2.00% |  |  |  | 5.90% |  |  |  | 2.00% | 5.90% | 6.80%
Surgical |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue |  |  |  |  |  |  |  |  | 5,022,456 | 4,976,261 | 3,883,444
Percent of product revenue | 7.40% |  |  |  | 8.10% |  |  |  | 7.40% | 8.10% | 7.30%
Ophthalmic |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue |  |  |  |  |  |  |  |  | 8,784,011 | 10,963,822 | 11,971,787
Percent of product revenue | 12.90% |  |  |  | 17.70% |  |  |  | 12.90% | 17.70% | 22.70%
Veterinary |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Product revenue |  |  |  |  |  |  |  |  | $ 2,865,187 | $ 2,476,998 | $ 2,574,578
Percent of product revenue | 4.20% |  |  |  | 4.00% |  |  |  | 4.20% | 4.00% | 4.90%

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and 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(a)) -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
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