Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 2,207,291	$ 7,354,107
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense	4,006,663	3,469,723
Paycheck Protection Program loan forgiveness		(9,799,100)
Gain on sale of equipment	(418,103)	(627,580)
Provision for deferred taxes	845,216	(717,269)
Amortization of intangible assets	307,698	0
Amortization of right-of-use assets	17,377
Accreted interest on note payable	27,326
(Increase) decrease in contracts receivable	(3,086,194)	3,936,155
(Increase) decrease in retainage receivable	(2,221,588)	1,475,863
Decrease (increase) in other receivables	489,771	(1,103,499)
Increase in contract assets	(3,206,678)	(674,444)
Decrease (increase) in prepaid expenses and other	2,424,047	(775,505)
Increase (decrease) in accounts payable	4,050,532	(2,107,138)
Increase (decrease) in accrued expenses and other current liabilities	2,229,419	(1,085,299)
Increase (decrease) in contract liabilities	2,861,585	(1,223,272)
Increase in income taxes payable	100,000	50,000
Net cash provided by (used in) operating activities	10,634,362	(1,827,258)
Cash flows from investing activities:
Acquisition of Revolt Energy		(150,000)
Acquisition of West Virginia Pipeline, net of cash received of $250,000		(3,250,000)
Investment in property and equipment	(4,671,687)	(7,385,469)
Proceeds from sales of property and equipment	643,603	693,291
Net cash used in investing activities	(4,028,084)	(10,092,178)
Cash flows from financing activities:
Preferred stock redemption	(1,210,525)
Preferred dividends paid		(309,000)
Borrowings on lines of credit and short term debt, net of (repayments)	(4,884,880)	5,335,542
Principal payments on long term debt	(3,342,215)	(2,053,278)
Net cash (used in) provided by financing activities	(9,437,620)	2,973,264
Decrease in cash and cash equivalents	(2,831,342)	(8,946,172)
Cash and cash equivalents beginning of period	8,226,739	11,216,820
Cash and cash equivalents end of period	5,395,397	2,270,648
Supplemental schedule of noncash investing and financing activities:
Purchases of property & equipment under financing agreements	461,784	349,139
Prepaid insurance premiums financed	3,352,971	3,213,402
Note payable to finance West Virginia Pipeline acquisition		3,000,000
Note payable to refinance short-term borrowing		3,500,000
Accrued dividends on preferred stock		231,750
Debt assumed in acquisitions	390,445	205,829
Sellers' note Tri-State Paving acquisition	936,000
Note payable to finance Tri-State Paving acquisition	7,500,000
Common stock issued to finance Tri-State Paving acquisition	1,048,218
Par value of common stock issued from preferred stock conversion	263
Operating lease right-of-use assets obtained in exchange for lease liability	365,379
Cash paid during the year for:
Interest	548,885	356,505
Income taxes	$ 6,706	$ 229,611