Revenue by Product Group (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue from External Customer [Line Items]
Product revenue	$ 14,494,489	$ 13,613,328
Orthobiologics
Revenue from External Customer [Line Items]
Product revenue	11,283,547	10,116,845
Surgical
Revenue from External Customer [Line Items]
Product revenue	988,864	983,628
Dermal
Revenue from External Customer [Line Items]
Product revenue	241,584	501,315
Ophthalmic
Revenue from External Customer [Line Items]
Product revenue	928,458	1,323,994
Veterinary
Revenue from External Customer [Line Items]
Product revenue	$ 1,052,036	$ 687,546