Note 6 - Accounts Payable and Accrued Expenses (Tables)

12 Months Ended

Dec. 31, 2018

Notes Tables

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

Account	December 31, 2018		December 31, 2017
Accounts payable	$	895,145	$	1,303,073
Accrued payroll and related costs		851,530		925,890
Other accrued expenses		250,570		184,131
Accrued interest		72,913		172,951
Total accounts payable and accrued expenses	$	2,070,158	$	2,586,045