Revenue by Product Group (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue from External Customer [Line Items]
Product revenue	$ 20,067,407	$ 18,882,277	$ 34,561,896	$ 32,495,605
Orthobiologics
Revenue from External Customer [Line Items]
Product revenue	16,506,226	10,903,364	27,789,773	21,020,209
Dermal
Revenue from External Customer [Line Items]
Product revenue	557,059	155,735	798,643	657,051
Surgical
Revenue from External Customer [Line Items]
Product revenue	1,830,022	1,464,505	2,818,886	2,448,133
Ophthalmic
Revenue from External Customer [Line Items]
Product revenue	464,340	5,299,732	1,392,798	6,623,726
Veterinary
Revenue from External Customer [Line Items]
Product revenue	$ 709,760	$ 1,058,941	$ 1,761,796	$ 1,746,486