Note 7 - Employment Agreements (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)
Louis A. Hoch [Member]
Supplemental Unemployment Benefits, Estimated Total Financial Impact	$ 2.0
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	1.3
Michael R. Long and Louis A. Hoch [Member] | Minimum [Member]
Supplemental Unemployment Benefits, Estimated Total Financial Impact, In Case of Death	1.0
Supplemental Unemployment Benefits, Estimated Total Financial Impact, In Case of Disability	0.7
Michael R. Long and Louis A. Hoch [Member] | Maximum [Member]
Supplemental Unemployment Benefits, Estimated Total Financial Impact, In Case of Disability	$ 0.8
Michael R. Long and Louis A. Hoch [Member]
Supplemental Unemployment Benefits, Separation Payments, Ratio	2.95
Supplemental Unemployment Benefits, Separation Payments for Non-competition, Ratio	2
Supplemental Unemployment Benefits, Separation Payments, Ratio, In Case of Death	2.95
Supplemental Unemployment Benefits, Separation Payments to Waive Deferred Compensation Payment, Maximum Period, In Case of Death	3 years
Supplemental Unemployment Benefits, Deferred Compensation Payment Due After Cessation, Period	30 days
Supplemental Unemployment Benefits, Separation Payments, In Case of Disability, Term	3 years
Michael R. Long [Member] | Minimum [Member]
Supplemental Unemployment Benefits, Estimated Total Financial Impact	$ 1.5
Michael R. Long [Member] | Maximum [Member]
Supplemental Unemployment Benefits, Estimated Total Financial Impact	2.0
Michael R. Long [Member]
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost	$ 1.3