Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Equity (Details Textual)

Note 12 - Equity (Details Textual) - USD ($)			3 Months Ended				6 Months Ended
Note 12 - Equity (Details Textual) - USD ($)	Jun. 18, 2019	Mar. 22, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 15, 2019
Stock Issued During Period, Value, New Issues			$ 5,166,441	$ 50,000
Payments of Stock Issuance Costs							$ 572,271
Proceeds from Issuance of Common Stock							$ 6,046,915	$ 200
Stock Issued During Period, Shares, Issued for Employee Bonuses								55,938
Stock Issued During Period, Value, Issued for Employee Bonuses					$ 151,881	$ 165,021		$ 317,000
Stock Issued During Period, Shares, Employee Benefit Plan							8,128	4,734
Stock Issued During Period, Value, Employee Benefit Plan			$ 19,588			$ 35,980	$ 20,000	$ 36,000
Private Placement [Member] \| Investor [Member]
Stock Issued During Period, Value, New Issues		$ 50,000
Shares Issued, Price Per Share		$ 2.80
Private Placement [Member] \| Maximum [Member]
Stock Purchase Agreement, Maximum Value									$ 3,000,000
Underwritten Public Offering [Member]
Shares Issued, Price Per Share	$ 0.75
Stock Issued During Period, Shares, New Issues	8,000,000
Stock Issued, Management Fee, Percentage	1.00%
Proceeds from Issuance of Common Stock	$ 5,555,000
Underwritten Public Offering [Member] \| Non-accountable Expenses [Member]
Payments of Stock Issuance Costs	50,000
Underwritten Public Offering [Member] \| Fees and Expenses of Legal Counsel [Member]
Payments of Stock Issuance Costs	100,000
Underwritten Public Offering [Member] \| Clearing Expenses [Member]
Payments of Stock Issuance Costs	$ 10,000
Underwritten Public Offering [Member] \| Offering Investor [Member]
Shares Issued, Price Per Share	$ 0.75
Stock Issued During Period, Shares, New Issues	4,000,000
Underwritten Public Offering [Member] \| Underwriter [Member]
Shares Issued, Price Per Share	$ 0.69375
Stock Issued During Period, Shares, New Issues	4,000,000
Over-Allotment Option [Member] \| Underwriter [Member]
Shares Issued, Price Per Share	$ 0.69375
Stock Issued During Period, Shares, New Issues	1,200,000