Note 13 - Fair Value Measurements - Black-Scholes Model and Assumptions (Details)	Nov. 01, 2017
Measurement Input, Share Price [Member]
Stock price	21.6
Measurement Input, Exercise Price [Member]
Stock price	33.3
Measurement Input, Expected Term [Member]
Stock price	4.38
Measurement Input, Risk Free Interest Rate [Member]
Stock price	0.019
Measurement Input, Price Volatility [Member]
Stock price	1.041
Measurement Input, Expected Dividend Rate [Member]
Stock price