Note 12 - Leases (Details Textual)	1 Months Ended	3 Months Ended	12 Months Ended
Note 12 - Leases (Details Textual)	Jun. 30, 2017 USD ($)	Mar. 31, 2019 USD ($) ft²	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Operating Lease, Right-of-Use Asset			$ 250,095	$ 281,688	$ 406,842
Operating Lease, Expense			198,000	229,000
Operating Lease, Payments			$ 339,000	$ 330,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset					$ 407,000
Office Space at 4995 Bradenton Avenue, Dublin Ohio [Member]
Area of Real Estate Property (Square Foot) \| ft²			5,000
Operating Lease, Monthly Base Rent			$ 3,000
Office Space at 560 Sylvan Avenue, Englewood Cliffs, New Jersey [Member]
Area of Real Estate Property (Square Foot) \| ft²		2,000
Operating Lease, Monthly Base Rent		$ 3,000
Office Space at 5600 Blazer Parkway, Dublin, Ohio [Member]
Area of Real Estate Property (Square Foot) \| ft²			25,000
Operating Lease, Monthly Base Rent			$ 27,000
Lessee, Operating Lease, Renewal Term (Year)			5 years
Operating Lease, Sublease, Monthly Rent Revenue	$ 39,000
Vehicle Lease [Member]
Operating Lease, Monthly Base Rent			$ 300
Office Equipment [Member]
Operating Lease, Monthly Base Rent			$ 100