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Note 10 - Accrued Expenses - Accrued Expenses (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Compensation and related expenses $ 2,806,699 $ 2,791,935
Facility construction costs 2,073,561
Professional fees 524,938 $ 553,630
Clinical trial costs 240,987 508,042
Research grants 393,085 539,053
Other 508,505 354,866
Total $ 6,547,775 $ 4,747,526