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