Note 6 - Stock-Based Compensation (Details) - Fair Value of Each SAR Using Black-Scholes Valuation Model Assumptions (2012 Stock Incentive Plan [Member])	0 Months Ended
	Apr. 03, 2013 Chief Financial Officer [Member]	Jun. 04, 2013
Note 6 - Stock-Based Compensation (Details) - Fair Value of Each SAR Using Black-Scholes Valuation Model Assumptions [Line Items]
Risk-free interest rates	0.57%	0.77%
Expected lives (in years)	4 years 3 months	4 years 228 days
Dividend yield	0.80%	0.70%
Expected volatility	35.76%	38.13%
Forfeiture rate	0.00%	6.37%