Stockholders' Equity (Narrative) (Details) - USD ($)		12 Months Ended
		Sep. 25, 2018	Sep. 26, 2017
Schedule Of Stockholders Equity [Line Items]
Preferred stock, shares authorized		5,000,000	5,000,000
Common stock, shares authorized		50,000,000	50,000,000
Common stock, shares outstanding		12,481,162	12,427,280
Common stock, par value		$ 0.001	$ 0.001
Stock based compensation expense		$ 417,000	$ 748,000
Stock option exercise		$ 29,000
Stock option exercise, shares		9,397
Aggregate intrinsic value of outstanding options		$ 787,000
Incentive Stock Option [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, shares		18,274	163,992
Incentive Stock Option [Member] | Minimum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		$ 2.70	$ 3.05
Stock options granted, per-share weighted average fair value		1.65	2.17
Incentive Stock Option [Member] | Maximum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		2.73	3.45
Stock options granted, per-share weighted average fair value		$ 1.95	$ 2.49
Incentive and Non-Statutory Stock Options [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, shares		129,381
Expected term (years)	[1]	7 years 6 months
Incentive and Non-Statutory Stock Options [Member] | Minimum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		$ 3.55
Stock options granted, per-share weighted average fair value		2.08
Expected term (years)			6 years 6 months
Incentive and Non-Statutory Stock Options [Member] | Maximum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		4.25
Stock options granted, per-share weighted average fair value		$ 2.52
Expected term (years)			7 years 6 months
Restricted Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Restricted stock granted, shares		97,544	103,440
Restricted stock granted, weighted average grant date fair value per share		$ 2.70
Vesting period		3 years	3 years
Remaining total unrecognized compensation cost related to unvested stock-based arrangements		$ 341,000
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition		1 year 7 months 6 days
Restricted Stock [Member] | Minimum [Member]
Schedule Of Stockholders Equity [Line Items]
Restricted stock granted, weighted average grant date fair value per share		$ 2.70	$ 3.15
Restricted Stock [Member] | Maximum [Member]
Schedule Of Stockholders Equity [Line Items]
Restricted stock granted, weighted average grant date fair value per share		$ 3.55	$ 3.20
Stock Options [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, shares	[2]	147,655
Stock options granted, exercise price	[2]	$ 3.68
Remaining total unrecognized compensation cost related to unvested stock-based arrangements		$ 431,000
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition		2 years 4 months 6 days
Stock option exercise, shares		9,398
Replacement Options [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, shares		49,491
Stock options granted, exercise price		$ 4.25
Vesting period		10 years
Percentage of vested options		100.00%
Two Thousand Eight Equity Incentive Compensation Plan [Member]
Schedule Of Stockholders Equity [Line Items]
Shares authorized to issue under plan		1,500,000
2018 Plan [Member]
Schedule Of Stockholders Equity [Line Items]
Shares authorized to issue under plan		750,000
Shares available for future grants		499,605
2018 Plan [Member] | Restricted Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Restricted stock granted, shares		60,507
Restricted stock granted, weighted average grant date fair value per share		$ 3.55
Vesting period		3 years
Exchange Program [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, shares		129,025
Stock options granted, per-share weighted average fair value		$ 2.08
Percentage of vested options		100.00%
Expected volatility		53.71%
Risk-free interest rate		2.83%
Expected term (years)		5 years
Exchange Program [Member] | Minimum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		$ 7.79
Exchange Program [Member] | Maximum [Member]
Schedule Of Stockholders Equity [Line Items]
Stock options granted, exercise price		$ 9.17

[1] Excluding options issued in the exchange program

[2] In connection with the Exchange Program, 129,025 options to purchase common stock were canceled, and 49,491 Replacement Options were granted.