Note 7 - Defined Benefit Plan (Tables)

9 Months Ended

Sep. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

	Pension Benefits
	Nine Months Ended September 30,
	2015			2014
Service cost	$	465		$	393
Interest cost		501			498
Expected return on plan assets		(876	)		(834	)
Amortization of prior service cost		(81	)		(81	)
Recognized net actuarial loss		312			195
Net periodic benefit cost	$	321		$	171