Note 8 - Accumulated Other Comprehensive Loss - Summary of Reclassifications from Accumulated Other Comprehensive Loss to Net (Loss) Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Amortization of defined benefit plan pension items:
Amortization of loss	$ 153	$ 63	$ 461	$ 497
Income tax effect	(63)	(26)	(189)	(204)
After tax	90	37	272	293
Amortization of loss on interest rate swap:
Reclassification to interest expense	33	27	82	80
Income tax effect	(14)	(11)	(34)	(33)
After tax	19	16	48	47
Total reclassifications, net of income tax	$ 109	$ 53	$ 320	$ 340