Note 5 - Other Accrued Expenses and Liabilities - Summary of Accrued Expenses (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Accrued interest payable	$ 927	$ 14,009
Accrued payroll and payroll related expenses	491,678	56,947
Accrued professional fees	142,056	327,950
Accrued clinical studies expenses	326,410	184,737
Other accrued expenses	82,768	38,026
Total	$ 1,043,839	$ 621,669