GOODWILL AND INTANGIBLE ASSETS - Intangible assets subject to amortization (Details) - USD ($)			3 Months Ended		9 Months Ended
	Jun. 30, 2026	Sep. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	5 years 9 months 18 days		5 years 9 months 18 days		5 years 9 months 18 days
Original Cost	$ 7,463,943		$ 7,463,943		$ 7,463,943
Accumulated Amortization and Impairment	3,588,941	$ 2,568,860	329,736	$ 164,199	1,020,081	$ 459,259
Net Book Value	$ 3,875,002	4,895,083	$ 3,875,002		$ 3,875,002
Customer relationships
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	5 years 1 month 6 days		5 years 1 month 6 days		5 years 1 month 6 days
Customer relationships | West Virginia Pipeline
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	54 months		54 months		54 months
Original Cost	$ 2,209,724		$ 2,209,724		$ 2,209,724
Accumulated Amortization and Impairment	1,215,345	1,049,610	55,245	55,245	165,735	165,735
Net Book Value	$ 994,379	1,160,114	$ 994,379		$ 994,379
Customer relationships | Heritage Painting
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	36 months		36 months		36 months
Original Cost	$ 121,100		$ 121,100		$ 121,100
Accumulated Amortization and Impairment	48,432	30,270	6,054	6,054	18,162	18,162
Net Book Value	$ 72,668	90,830	$ 72,668		$ 72,668
Customer relationships | Tri-State Paving
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	70 months		70 months		70 months
Original Cost	$ 1,649,159		$ 1,649,159		$ 1,649,159
Accumulated Amortization and Impairment	673,407	563,463	27,486	41,229	109,944	123,687
Net Book Value	$ 975,752	1,085,696	$ 975,752		$ 975,752
Tradename
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	8 years 6 months		8 years 6 months		8 years 6 months
Tradename | West Virginia Pipeline
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	54 months		54 months		54 months
Original Cost	$ 263,584		$ 263,584		$ 263,584
Accumulated Amortization and Impairment	144,979	125,215	6,588	6,588	19,764	19,764
Net Book Value	$ 118,605	138,369	$ 118,605		$ 118,605
Tradename | Tri-State Paving
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	70 months		70 months		70 months
Original Cost	$ 203,213		$ 203,213		$ 203,213
Accumulated Amortization and Impairment	82,979	69,431	3,387	5,081	13,548	15,241
Net Book Value	$ 120,234	133,782	$ 120,234		$ 120,234
Tradename | Tribute Contracting & Consultants acquisition
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	41 months		41 months		41 months
Original Cost	$ 80,000		$ 80,000		$ 80,000
Accumulated Amortization and Impairment	25,347	13,333	4,016	2,073	12,014	4,836
Net Book Value	$ 54,653	66,667	$ 54,653		$ 54,653
Tradename | Rigney Digital Systems
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	123 months		123 months		123 months
Original Cost	$ 657,100		$ 657,100		$ 657,100
Accumulated Amortization and Impairment	44,802		14,934		44,802
Net Book Value	$ 612,298	657,100	$ 612,298		$ 612,298
Non-competes
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	8 years 6 months		8 years 6 months		8 years 6 months
Non-competes | West Virginia Pipeline
GOODWILL AND INTANGIBLE ASSETS
Original Cost	$ 83,203		$ 83,203		$ 83,203
Accumulated Amortization and Impairment	83,203	83,203	0	0	0	0
Net Book Value	0	0	0		0
Non-competes | Tri-State Paving
GOODWILL AND INTANGIBLE ASSETS
Original Cost	39,960		39,960		39,960
Accumulated Amortization and Impairment	39,960	39,960	0	0	0	0
Net Book Value	$ 0	0	$ 0		$ 0
Non-competes | Rigney Digital Systems
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	111 months		111 months		111 months
Original Cost	$ 46,300		$ 46,300		$ 46,300
Accumulated Amortization and Impairment	3,474		1,158		3,474
Net Book Value	$ 42,826	46,300	$ 42,826		$ 42,826
Non-compete 1 | Tribute Contracting & Consultants acquisition
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	101 months		101 months		101 months
Original Cost	$ 520,000		$ 520,000		$ 520,000
Accumulated Amortization and Impairment	82,367	43,333	13,036	13,472	39,034	31,434
Net Book Value	$ 437,633	476,667	$ 437,633		$ 437,633
Non-compete 2 | Tribute Contracting & Consultants acquisition
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	77 months		77 months		77 months
Original Cost	$ 10,000		$ 10,000		$ 10,000
Accumulated Amortization and Impairment	1,992	1,042	326	259	950	605
Net Book Value	$ 8,008	8,958	$ 8,008		$ 8,008
Backlog
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	8 months 12 days		8 months 12 days		8 months 12 days
Backlog | Tribute Contracting & Consultants acquisition
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	5 months		5 months		5 months
Original Cost	$ 1,320,000		$ 1,320,000		$ 1,320,000
Accumulated Amortization and Impairment	1,044,932	550,000	164,932	$ 34,198	494,932	$ 79,795
Net Book Value	$ 275,068	770,000	$ 275,068		$ 275,068
Backlog | Rigney Digital Systems
GOODWILL AND INTANGIBLE ASSETS
Remaining Life	15 months		15 months		15 months
Original Cost	$ 260,600		$ 260,600		$ 260,600
Accumulated Amortization and Impairment	97,722		32,574		97,722
Net Book Value	$ 162,878	$ 260,600	$ 162,878		$ 162,878