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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Jun. 29, 2021	Mar. 30, 2021	Dec. 29, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 29, 2021	Jun. 30, 2020	Sep. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense						$ 327	$ 223
Stock options exercised, shares						170,248	15,646
Proceeds from stock option exercises						$ 407
Stock issued against stock options exercised							2,413
Stock options granted, shares						90,000
Stock options granted, exercise price	$ 3.81					$ 3.81		$ 3.56
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised, shares	126,918	35,346	7,984		2,413
Chief Executive Officer [Member] \| 2018 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, per-share weighted average fair value	$ 1.22
Stock options granted, shares	90,000
Stock options granted, exercise price	$ 2.33					$ 2.33
Director [Member] \| 2018 Plan [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, per-share weighted average fair value	$ 2.78
Stock options granted, shares	12,948
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate Intrinsic Value, Outstanding	$ 358					$ 358
Aggregate Intrinsic Value, Exercisable	331					331
Remaining total unrecognized compensation cost related to unvested stock-based arrangements	110					$ 110
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition						1 year 6 months
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining total unrecognized compensation cost related to unvested stock-based arrangements	$ 60					$ 60
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, period for recognition						4 months 24 days
Restricted Stock [Member] \| Restricted stock units vest three years following the grant date [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, per-share weighted average fair value				$ 1.54
Stock options granted, shares				46,336
Restricted Stock [Member] \| Restricted stock units vested on their grant date [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, per-share weighted average fair value				$ 1.67
Stock options granted, shares				14,000
Restricted Stock [Member] \| 2018 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, shares				60,336
Performance shares [Member] \| Chief Executive Officer [Member] \| 2018 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, per-share weighted average fair value	$ 2.77
Stock options granted, shares	10,000