Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Feb. 29, 2024	Feb. 28, 2023
Cash flows from operations:
Net income (loss) from continuing operations	$ (424,259)	$ 350,295
Net loss on discontinued operations	(40,781)	(8,085)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Stock based compensation	65,957	68,888
Decrease in obsolete inventory reserves	(6,098)	(27,086)
Gain on disposal of property, plant, and equipment	0	(2,900)
Depreciation and amortization expense	208,116	201,903
Increase in allowance for expected credit losses - accounts receivable	391	1,260
Deferred income taxes	(124,863)	91,136
Changes in assets and liabilities:
Accounts receivable	385,436	(934,410)
Inventories	54,123	(1,061,421)
Other assets	(301,491)	(91,007)
Accounts payable	(1,109,202)	(129,129)
Contracts in progress, net	858,512	701,406
Customer deposits	670,992	1,969,871
Accrued expenses	(375,739)	26,437
Net cash provided by (used in) operating activities - continuing operations	(67,670)	1,165,243
Net cash provided by (used in) operating activities - discontinued operations	(31,604)	103,354
Net cash provided by (used in) operating activities	(99,274)	1,268,597
Cash flows from investing activities:
Purchases of property, plant, and equipment	(281,174)	(296,114)
Net proceeds from sale of assets	0	2,900
Net cash used in investing activities - continuing operations	(281,174)	(293,214)
Net cash used in investing activities - discontinued operations	0	(17,543)
Net cash used in investing activities	(281,174)	(310,757)
Cash flows from financing activities:
Net change in line of credit	(466,917)	868,941
Principal payments on finance lease obligations	(22,769)	(35,155)
Repayment of term debt	(26,489)	(26,870)
Repurchases of common stock	(37,654)	(20,334)
Net cash provided by (used in) financing activities - continuing operations	380,005	(951,300)
Net cash used in financing activities - discontinued operations	(1,086)	(7,583)
Net cash provided by (used in) financing activities	378,919	(958,883)
Net decrease in cash	(1,529)	(1,043)
Cash at beginning of period	4,014	5,055
Cash at end of period	2,485	4,012
Supplemental disclosures of cash flow information:
Interest	161,033	122,315
Income taxes	0	46
Right-of-use (ROU) assets acquired (included in other assets)	38,192	0
Amortization of operating lease ROU assets (included in other assets)	2,383	3,319
Computer Software, Intangible Asset [Member]
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Amortization of cloud computing implementation costs	$ 30,455	$ 0