Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Property, Plant and Equipment [Table Text Block]

Leasehold improvements	Shorter of estimated useful life or remaining lease term
Buildings and improvements (in years)	20	-	40
Machinery & Equipment (in years)	7	-	15
Furniture, fixtures, computers & software (in years)	3	-	7

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

	Year Ended December 31,
	2016		2015		2014
Share-based compensation expense	$	1,056	$	1,069	$	1,119

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Year Ended December 31,
	2016			2015			2014
Expected volatility		29.7	%	31.5%	-	32.3%	32.8%	-	37.9%
Expected dividends		None			None			None
Risk-free interest rate		0.9	%	1.0%	-	1.2%	0.7%	-	0.9%
Exercise price	$	22.02		$19.97	-	$22.36	$22.55	-	$25.48
Expected term (in years)		5.0			5.0		3.8	to	5.0
Weighted-average grant-date fair value	$	6.11			$6.04			$7.24