Consolidated Statement of Stockholders' Deficit - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In-Capital	Convertible Preferred Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit	Treasury Stock [Member]
Beginning Balance (in shares) at Oct. 01, 2016		22,518,058		500,000			0
Beginning Balance at Oct. 01, 2016	$ (86,974)	$ 2	$ 50,771	$ 50,000	$ (58,891)	$ (128,856)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share repurchase program (in shares)		864,752		100,000
Share repurchase program	(34,282)		(24,282)	$ (10,000)
Preferred stock dividends	(4,261)		(4,261)
Series A Preferred Stock dividend - Common Stock (in shares)		0
Share-based compensation expense	1,158		1,158
Exercise of stock warrants (in shares)		2,003,914
Exercise of stock warrants	23,045		23,045
Restricted stock activity (in shares)		0
Restricted stock activity	0		0
Exercise of stock options, cashless (in shares)		82,124
Stock option activity	(1,013)		(1,013)
Net income	28,801					28,801
Other comprehensive income, net of tax	15,016				15,016
Ending Balance (in shares) at Sep. 30, 2017		23,739,344		400,000			0
Ending Balance at Sep. 30, 2017	(58,510)	$ 2	45,418	$ 40,000	(43,875)	(100,055)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share repurchase program (in shares)		1,183,412		0
Share repurchase program	(26,586)		(26,586)	$ 0
Preferred stock conversion (in shares)		2,649,962		307,000
Preferred stock conversion	0		30,700	$ (30,700)
Preferred stock dividends	(1,896)		(1,896)
Series A Preferred Stock dividend - Common Stock (in shares)		0
Share-based compensation expense	2,496		2,496
Exercise of stock warrants (in shares)		1,921,901
Exercise of stock warrants	22,103	$ 1	22,102
Restricted stock activity (in shares)		33,963
Restricted stock activity	(370)		(370)
Exercise of stock options, cashless (in shares)		97,504
Stock option activity	(1,841)		(1,841)
Net income	30,820					30,820
Other comprehensive income, net of tax	5,448				5,448
Ending Balance (in shares) at Sep. 29, 2018		27,259,262		93,000			0
Ending Balance at Sep. 29, 2018	(28,336)	$ 3	70,023	$ 9,300	(38,427)	(69,235)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share repurchase program (in shares)		1,782,568		364			1,782,568
Share repurchase program	(50,370)		(52)	$ (36)			$ (50,282)
Preferred stock conversion (in shares)		799,615		92,636
Preferred stock conversion	0		9,264	$ (9,264)
Share-based compensation expense	4,173		4,173
Exercise of stock warrants (in shares)		144,996
Exercise of stock warrants	1,499	$ 0	1,499
Restricted stock activity (in shares)		51,195
Restricted stock activity	$ (596)		(596)
Exercise of stock options, cashless (in shares)	30,221	3,836
Stock option activity	$ (40)		(40)
Net income	24,300					24,300
Other comprehensive income, net of tax	(17,727)				(17,727)
Ending Balance (in shares) at Sep. 28, 2019		26,476,336		0			1,782,568
Ending Balance at Sep. 28, 2019	$ (67,811)	$ 3	$ 84,271	$ 0	$ (56,154)	$ (45,649)	$ (50,282)