Note 9 - Accrued Expenses

3 Months Ended

Mar. 31, 2015

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

9.           Accrued Expenses

Accrued expenses consist of the following:

	March 31, 2015		December 31, 2014
Compensation and related expenses	$	2,157,864	$	2,791,935
Professional fees		596,018		553,630
Clinical trial costs		562,072		508,042
Research grants		481,179		539,053
Other		445,846		354,866
Total	$	4,242,979	$	4,747,526