Stock-Based Compensation (Details) - USD ($)					3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 22, 2016	Jul. 21, 2016	Jul. 21, 2015	May. 11, 2015	Sep. 27, 2015	Sep. 27, 2014	Sep. 27, 2015	Sep. 27, 2014	Apr. 01, 2007
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Income tax benefit from share-based compensation							$ 510,400	$ 1,173,300
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares earned					36,466		36,466
Unrecognized compensation costs					$ 2,300,000		$ 2,300,000
Nonvested PSU shares, Outstanding [Roll Forward]
Outstanding, non-vested beginning of period (in shares)							203,841
Granted (in shares)							103,000
Vested (in shares)							(87,107)
Forfeited/cancelled (in shares)							(80,268)
Outstanding, non-vested end of period (in shares)					139,466		139,466
Nonvested PSU shares, Weighted-Average Grant Date Fair Value [Roll Forward]
Outstanding, non-vested beginning of period (in dollars per share)							$ 20.65
Granted (in dollars per share)							22.15
Vested (in dollars per share)							13.84
Forfeited/cancelled (in dollars per share)							28.57
Outstanding, non-vested end of period (in dollars per share)					$ 21.45		$ 21.45
Stock Options:
Vesting period							3 years
Share released and vested (in shares)							87,107
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs					$ 600,000		$ 600,000
Annual vesting percentage (in hundredths)		25.00%
Stock Options:
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			80,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			$ 22.64
Monthly percentage of vesting of share based compensation	2.10%
Additional vesting months after the initial period	36 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value					0
Vesting period			4 years
Restricted Stock | Non-Employee Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs					$ 500,000		$ 500,000
Unrecognized compensation costs, period for recognition							3 years
Nonvested PSU shares, Outstanding [Roll Forward]
Granted (in shares)				10,000
Stock Options:
Vesting period				4 years
Second Amended and Restated 1994 Stock and Incentive Plan | Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Measurement period					1 year
Second Amended and Restated 1994 Stock and Incentive Plan | Restricted Stock | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs					$ 100,000		$ 100,000
Unrecognized compensation costs, period for recognition							1 year
Nonvested PSU shares, Outstanding [Roll Forward]
Outstanding, non-vested end of period (in shares)					22,500		22,500
Nonvested PSU shares, Weighted-Average Grant Date Fair Value [Roll Forward]
Granted (in dollars per share)									$ 10.56
Stock Options:
Shares of common stock granted (in shares)									225,000
Vesting period									10 years
Selling, General and Administrative Expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-cash stock-based compensation					$ 268,000	$ 228,000	$ 399,700	$ 677,600