Note 13 - Segment and Geographic Information (Details) - Product Revenue by Product Group (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Product Revenue	$ 21,975,312	$ 17,023,346	$ 57,593,873	$ 51,585,242
Orthobiologics [Member]
Segment Reporting Information [Line Items]
Product Revenue	18,899,873	12,830,566	48,750,277	40,620,339
Dermal [Member]
Segment Reporting Information [Line Items]
Product Revenue	401,355	267,766	938,966	1,066,409
Surgical [Member]
Segment Reporting Information [Line Items]
Product Revenue	1,452,946	1,136,248	4,581,496	3,955,134
Ophthalmic [Member]
Segment Reporting Information [Line Items]
Product Revenue	366,138	1,425,609	938,134	2,818,407
Veterinary [Member]
Segment Reporting Information [Line Items]
Product Revenue	$ 855,000	$ 1,363,157	$ 2,385,000	$ 3,124,953