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Stockholders' Equity (Narrative) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 21, 2013 | Sep. 26, 2017 | Sep. 27, 2016
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 |  | 12,427,280 | 12,282,625
Common stock, par value |  | $ 0.001 | $ 0.001
Stock based compensation expense |  | $ 748,000 | $ 718,000
Stock option exercise |  |  | $ 39,000
Stock option exercise, shares |  |  | 19,531
Aggregate intrinsic value of outstanding options |  | 168,000 |
Aggregate intrinsic value of exercisable options |  | $ 168,000 |
Common Stock [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Issuance of common shares and warrants in public offering, shares | 2,200,000 |  |
Stock option exercise, shares |  |  | 19,531
Two Thousand Eight Equity Incentive Compensation Plan [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Shares authorized to issue under plan |  | 1,500,000 |
Shares available for future grants |  | 225,195 |
Incentive Stock Option [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, shares |  | 163,992 | 72,178
Incentive Stock Option [Member] | Minimum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, exercise price |  | $ 3.05 |
Stock options granted, per-share weighted average fair value |  | 2.17 |
Incentive Stock Option [Member] | Maximum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, exercise price |  | 3.45 |
Stock options granted, per-share weighted average fair value |  | $ 2.49 |
Incentive and Non-Statutory Stock Options [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, shares |  |  | 22,686
Incentive and Non-Statutory Stock Options [Member] | Minimum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, exercise price |  |  | $ 4.04
Stock options granted, per-share weighted average fair value |  |  | 2.85
Incentive and Non-Statutory Stock Options [Member] | Maximum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, exercise price |  |  | 6.23
Stock options granted, per-share weighted average fair value |  |  | $ 4.52
Restricted Stock [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Restricted stock granted, shares |  | 103,440 | 44,755
Restricted stock granted, weighted average grant date fair value per share |  |  | $ 4.18
Vesting period |  | 3 years | 3 years
Remaining total unrecognized compensation cost related to unvested stock-based arrangements |  | $ 261,000 |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition |  | 1 year 5 months 12 days |
Restricted Stock [Member] | Minimum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Restricted stock granted, weighted average grant date fair value per share |  | $ 3.15 |
Restricted Stock [Member] | Maximum [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Restricted stock granted, weighted average grant date fair value per share |  | $ 3.20 |
Stock Options [Member] |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |
Stock options granted, shares |  | 163,992 |
Stock options granted, exercise price |  | $ 3.15 |
Remaining total unrecognized compensation cost related to unvested stock-based arrangements |  | $ 535,000 |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition |  | 1 year 10 months 17 days |
Stock option exercise, shares |  | 0 |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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