Note 8 - Accounts Payable and Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

	December		March
		31, 2017		31, 2018
Accounts payable and accrued expenses	$	173,357	$	273,817
Accrued interest		50,748		77,183
Total accounts payable and accrued expenses	$	224,105	$	351,000