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Note 9 - Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2014

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

		December 31,
		2014				2013
Compensation and related expenses		$	2,791,935			$	2,870,147
Professional fees			553,630				383,231
Clinical trial costs			508,042				882,651
Research grants			539,053				610,498
Restructuring costs			8,384				24,638
Other			346,482				766,716
Total		$	4,747,526			$	5,537,881

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Tabular disclosure of the components of accrued liabilities.

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