Note 7 - Accrued Liabilities (Tables)

3 Months Ended

Mar. 31, 2014

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

	March 31, 2014		December 31, 2013
Amounts due to contract research organizations and other contractual agreements	$	1,411,249	$	1,711,934
Accrued payroll and related benefits		661,151		900,434
Accrued professional fees		65,000		63,500
Accrued interest on notes payable		48,438	─
Other		20,000		31,785
Total accrued liabilities	$	2,205,838	$	2,707,653