Note 5 - Stock-based Compensation (Details) (USD $)	12 Months Ended
	Aug. 25, 2013	Aug. 26, 2012	Aug. 28, 2011	Aug. 29, 2010
Note 5 - Stock-based Compensation (Details) [Line Items]
Shares Paid for Tax Withholding for Share Based Compensation (in Shares)	45,628	17,265	9,992
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)	$ 3.83	$ 2.86	$ 3.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 183,075	$ 111,922	$ 73,235
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	319,243
Proceeds from Stock Options Exercised	21,560	0	32,510
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	26,063	32,384	21,901
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 4.64	$ 4.24	$ 4.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	6 years 146 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares)	199,080	212,496	193,999
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	310,786	629,192	265,847
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term	5 years 328 days	6 years 146 days	6 years 6 months
2005 Stock Option Plan [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures (in Shares)	64,500	27,666	25,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	259,916	264,500	248,166	219,666
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 4.97	$ 4.44	$ 4.16	$ 3.72
Employee Stock Option [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	191,889
Exercisable at $2.13 [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	18,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 2.13
Exercisable Between $3.00 and $3.47 [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	54,000
Exercisable Between $3.00 and $3.47 [Member] | Minimum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 3.00
Exercisable Between $3.00 and $3.47 [Member] | Maximum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 3.47
Exercisable Between $4.93 and $6.87 [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	187,916
Exercisable Between $4.93 and $6.87 [Member] | Minimum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 4.93
Exercisable Between $4.93 and $6.87 [Member] | Maximum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 6.87
Nonvested [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number (in Shares)	60,836
Restricted Stock [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 43,112
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Intrinsic Value, Amount Per Share (in Dollars per share)	$ 88,188
Minimum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	5 years	5 years	5 years
Maximum [Member]
Note 5 - Stock-based Compensation (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	10 years	10 years	10 years