Net Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 26, 2020	Mar. 27, 2020	Dec. 27, 2019	Sep. 30, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 28, 2018	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 1,927	$ 2,114	$ 1,523	$ 1,189	$ 1,794	$ 1,211	$ 670	$ 1,072	$ 6,753	$ 4,747
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic									32	38
Net Income (Loss) Available to Common Stockholders, Basic									$ 6,721	$ 4,709
Weighted Average Number of Shares Outstanding, Basic									10,417,445	10,306,947
Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends									309,993	211,179
Net earnings/loss (in dollars per share)	$ 0.18	$ 0.20	$ 0.15	$ 0.11	$ 0.17	$ 0.12	$ 0.06	$ 0.10	$ 0.65	$ 0.46
Net Income (Loss) Attributable to Parent, Diluted									$ 6,753	$ 4,747
Diluted shares									10,727,438	10,518,126
Diluted Earnings/ (Loss) Per Share (in dollars per share)	$ 0.18	$ 0.20	$ 0.14	$ 0.11	$ 0.17	$ 0.11	$ 0.06	$ 0.10	$ 0.63	$ 0.45
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									1,202	61,475