Note 17 - Employment Agreements (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Officer [Member]
Employment Agreement Term	5 years
Former CEO [Member]
Deferred Compensation Arrangement with Individual, Recorded Liability			$ 619,000
Deferred Compensation Arrangement with Individual, Death Benefit	$ 0	$ 0
Deferred Compensation Arrangement With Individual Recorded Liability Current	$ 207,000	$ 430,000