Note 14 - Segment and Geographic Information - Product Revenue by Product Group (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Orthobiologics [Member]
Product revenue	$ 19,282,919	$ 18,278,254	$ 31,255,419	$ 29,850,404
Dermal [Member]
Product revenue	303,117	348,961	719,300	537,612
Surgical [Member]
Product revenue	1,647,005	1,376,530	3,036,600	3,128,549
Ophthalmic [Member]
Product revenue	414,991	363,411	919,463	571,996
Veterinary [Member]
Product revenue	1,250,000	900,000	2,481,932	1,530,000
Product revenue	$ 22,898,032	$ 21,267,156	$ 38,412,714	$ 35,618,561