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Note 14 - Segment and Geographic Information (Details) - Product revenue by product group (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Segment Reporting Information [Line Items]        
Product Revenue $ 17,023,346 $ 14,055,440 $ 51,585,242 $ 46,551,045
Orthobiologics [Member]
       
Segment Reporting Information [Line Items]        
Product Revenue 12,830,566 9,242,783 40,620,339 30,262,991
Dermal [Member]
       
Segment Reporting Information [Line Items]        
Product Revenue 267,766 376,251 1,066,409 1,033,302
Surgical [Member]
       
Segment Reporting Information [Line Items]        
Product Revenue 1,136,248 1,426,273 3,955,134 3,874,405
Ophthalmic [Member]
       
Segment Reporting Information [Line Items]        
Product Revenue 1,425,609 1,891,433 2,818,407 8,515,160
Veterinary [Member]
       
Segment Reporting Information [Line Items]        
Product Revenue $ 1,363,157 $ 1,118,700 $ 3,124,953 $ 2,865,187