Note 12 - Segment and Geographic Information (Details) - Product Revenue by Product Group (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Product Revenue	$ 21,267,156	$ 20,067,407	$ 35,618,561	$ 34,561,896
Orthobiologics [Member]
Segment Reporting Information [Line Items]
Product Revenue	18,278,254	16,506,226	29,850,404	27,789,773
Dermal [Member]
Segment Reporting Information [Line Items]
Product Revenue	348,961	557,059	537,612	798,643
Surgical [Member]
Segment Reporting Information [Line Items]
Product Revenue	1,376,530	1,830,022	3,128,549	2,818,886
Ophthalmic [Member]
Segment Reporting Information [Line Items]
Product Revenue	363,411	464,340	571,996	1,392,798
Veterinary [Member]
Segment Reporting Information [Line Items]
Product Revenue	$ 900,000	$ 709,760	$ 1,530,000	$ 1,761,796