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Note 3 - Share-based Compensation Expenses for Continuing Operations (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Selling, General and Administrative Expenses [Member]    
Share-based compensation expense $ 145,878 $ 133,459
Research and Development Expense [Member]    
Share-based compensation expense 28,485 28,760
Share-based compensation expense $ 174,363 $ 162,219