Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	May 31, 2022	May 31, 2021
Cash flows from operations:
Net income (loss)	$ (231,136)	$ (251,148)
Adjustments to reconcile net income (loss) to net cash used by operating activities:
Stock based compensation	157,465	141,799
Decrease in obsolete inventory reserves	(197,613)	(144,933)
Gain on disposal of property, plant, and equipment	(3,971)	7,998
Depreciation and amortization expense	350,435	308,267
Accrued interest on deferred debt payments	8,520	8,416
Increase (decrease) in allowance for doubtful accounts	(3,127)	9,939
Deferred income taxes	(63,744)	(74,192)
Changes in assets and liabilities:
Accounts receivable	185,551	(24,231)
Inventories	(1,479,479)	(1,088,928)
Net investment in sales-type leases		17,235
Other assets	(619,103)	(284,598)
Accounts payable	787,195	(276,807)
Contracts in progress, net	(541,716)	(346,797)
Customer deposits	1,541,000	786,985
Income taxes payable	(500)	3,900
Accrued expenses	(178,916)	(116,948)
Net cash used by operating activities	(281,197)	(1,340,039)
Cash flows from investing activities:
Purchases of property, plant, and equipment	(509,097)	(318,958)
Net proceeds from sale of assets	9,300	8,000
Net cash used in investing activities:	(499,797)	(310,958)
Cash flows from financing activities:
Net change in line of credit	628,695	1,729,000
Principal payments on finance lease obligations	(38,317)
Proceeds from term debt	350,000
Repayment of term debt	(47,289)	(44,998)
Cost of equity issuance	(17,346)
Repurchases of common stock	(92,432)	(30,471)
Net cash provided by financing activities	783,311	1,653,531
Net increase in cash:	2,317	2,534
Cash at beginning of period	2,658	2,684
Cash at end of period	4,975	5,218
Supplemental disclosures of cash flow information:
Interest	155,385	110,180
Income taxes	800	$ 2,869
Supplemental disclosures of non-cash operating activities:
Right-of-use (ROU) assets acquired (included in other assets)	389,300
Alumni Capital [Member]
Supplemental disclosures of non-cash operating activities:
Common stock purchase agreement shares issued (included in other assets)	$ 117,200