QUARTERLY FINANCIAL DATA (UNAUDITED) (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
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 46,446	$ 47,364	$ 44,171	$ 44,734	$ 43,922	$ 40,324	$ 37,294	$ 35,441
Gross Profit	6,737	6,642	5,503	5,239	6,394	5,605	4,586	5,059	$ 24,120	$ 21,644
Net income	$ 1,927	$ 2,114	$ 1,523	$ 1,189	$ 1,794	$ 1,211	$ 670	$ 1,072	$ 6,753	$ 4,747
Basic earnings / (loss) per share (in dollars per share)	$ 0.18	$ 0.20	$ 0.15	$ 0.11	$ 0.17	$ 0.12	$ 0.06	$ 0.10	$ 0.65	$ 0.46
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