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Note 7 - Accrued Expenses - Accrued expenses (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Accrued professional fees $ 276,239 $ 174,915
PayOnline accrual 69,039 1,126,273
Accrued interest 43,021 108,202
Accrued bonus 1,318,060 1,157,556
Accrued foreign taxes 2,064 (45,952)
Other accrued expenses 91,921 14,953
Total accrued expenses $ 1,800,344 $ 2,535,947