Note 11 - Stock-based Compensation (Tables)

12 Months Ended

Aug. 31, 2016

Notes Tables

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

	August 31, 2016			August 31, 2015
Dividend yield		0.00	%		0.00	%
Expected volatility		46.0	%		46.6	%
Expected life of option (years)		10			10
Weighted average risk-free interest rate		1.63	%		1.63	%

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Shares (#)			Weighted Average Exercise Price		Aggregate Intrinsic Value
Outstanding at August 31, 2014		239,000		$	11.66
Options granted		45,067			20.10
Options exercised		(38,333	)		9.00
Options terminated		(4,000	)		10.20
Outstanding at August 31, 2015		241,734			13.72
Options granted		53,447			14.85
Options exercised		0			0.00
Options terminated		(12,000	)		13.38
Outstanding at August 31, 2016		283,181		$	13.95	$	392,370
Exercisable at August 31, 2016		188,600		$	13.45	$	336,683