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Stockholders' Equity (Narrative) (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 07, 2015 | Aug. 21, 2013 | Sep. 27, 2016 | Sep. 30, 2015
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Preferred stock, shares authorized |  |  | 5,000,000 | 5,000,000
Preferred stock, par value |  |  | $ 0.01 | $ 0.01
Common stock, par value |  |  | $ 0.001 | $ 0.001
Aggregate amount of stock value authorized by SEC to be issued | $ 75,000,000 |  |  |
Issuance of common shares and warrants in public offering, shares | 2,783,810 |  |  |
Public offering, shares issued, price per unit | $ 8.15 | $ 2.50 |  |
Proceeds from shares issued | $ 20,600,000 |  |  |
Stock based compensation expense |  |  | $ 718,000 | $ 478,000
Stock option exercise |  |  | $ 39,000 | 75,000
Stock option exercise, shares |  |  | 19,531 |
Net proceeds from warrant exercises |  |  | $ 0 | $ 3,221,000
Aggregate intrinsic value of outstanding options |  |  | 340,000 |
Aggregate intrinsic value of exercisable options |  |  | 249,000 |
Common Stock [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Issuance of common shares and warrants in public offering, shares |  | 2,200,000 |  | 2,783,810
Stock option exercise |  |  |  |
Stock option exercise, shares |  |  | 19,531 | 36,549
Stock issued from exercise of warrants |  |  |  | 1,182,600
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 |  |  | 478,590 |
Classa Warrants [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Warrants issued |  | 2,200,000 |  |
Number of common stock to be purchased by warrants |  | 2,200,000 |  |
Number of shares in each unit |  | 1 |  |
Number of warrants in each unit |  | 1 |  |
Shares covered by each warrant |  | 1 |  |
Exercise date |  | Aug. 16, 2018 |  |
Exercise price |  | $ 2.75 |  |
Classb Warrants [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Warrants issued |  | 2,200,000 |  |
Number of common stock to be purchased by warrants |  | 1,100,000 |  |
Number of shares in each unit |  | 1 |  |
Number of warrants in each unit |  | 2 |  |
Shares covered by each warrant |  | 1 |  |
Exercise date |  | May 16, 2014 |  |
Exercise price |  | $ 2.50 |  |
Underwriters [Member] | Classa Warrants [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Warrants issued |  | 330,000 |  |
Number of common stock to be purchased by warrants |  | 330,000 |  |
Underwriters [Member] | Classb Warrants [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Warrants issued |  | 330,000 |  |
Number of common stock to be purchased by warrants |  | 165,000 |  |
Underwriters [Member] | Representative Warrants [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Warrants issued |  | 154,000 |  |
Number of common stock to be purchased by warrants |  | 154,000 |  |
Exercise price |  | $ 3.125 |  |
Underwriters [Member] | Representative Warrants [Member] | Minimum [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Exercise date |  | May 16, 2014 |  |
Underwriters [Member] | Representative Warrants [Member] | Maximum [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Exercise date |  | Aug. 16, 2016 |  |
Warrant [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Net proceeds from warrant exercises |  |  |  | $ 9,782,000
Restricted Stock [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Restricted stock granted, shares |  |  | 44,755 | 24,586
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 |  |  | $ 314,000 |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition |  |  | 1 year 4 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 |  |  |  | $ 8.23
Restricted Stock [Member] | Maximum [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Restricted stock granted, weighted average grant date fair value per share |  |  |  | $ 8.60
Stock Options [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Stock options granted, shares |  |  | 94,864 |
Stock options granted, exercise price |  |  | $ 5.07 |
Remaining total unrecognized compensation cost related to unvested stock-based arrangements |  |  | $ 751,000 |
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition |  |  | 1 year 7 months 6 days |
Stock option exercise, shares |  |  | 19,530 |
Incentive and Non-Statutory Stock Options [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Stock options granted, shares |  |  | 22,686 | 80,871
Incentive and Non-Statutory Stock Options [Member] | Minimum [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Stock options granted, exercise price |  |  | $ 4.04 | $ 6.64
Stock options granted, per-share weighted average fair value |  |  | 2.85 | 4.82
Incentive and Non-Statutory Stock Options [Member] | Maximum [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Stock options granted, exercise price |  |  | 6.23 | 9.17
Stock options granted, per-share weighted average fair value |  |  | $ 4.52 | $ 6.88
Incentive Stock Option [Member] |  |  |  |
Schedule Of Stockholders Equity [Line Items] |  |  |  |
Stock options granted, shares |  |  | 72,178 | 112,593

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