Consolidated Balance Sheets - USD ($)	Nov. 30, 2024	Nov. 30, 2023
Current assets:
Cash	$ 1,860	$ 4,014
Accounts receivable-customers, net of allowance for expected credit losses of $108,636 and net of allowance for doubtful accounts of $32,137 in 2024 and 2023, respectively	2,372,876	3,432,216
Inventories, net	10,327,913	11,031,362
Cost and profit in excess of billings	213,195	289,282
Other current assets	208,465	296,662
Current assets of discontinued operations	0	31,958
Total current assets	13,124,309	15,085,494
Property, plant, and equipment, net	5,150,870	5,060,595
Assets held for lease, net	89,033	145,494
Deferred income taxes, net	2,440,297	2,503,213
Other assets	436,175	583,752
Other assets of discontinued operations	0	1,023,566
Total assets	21,240,684	24,402,114
Liabilities, Current [Abstract]
Accounts payable	944,448	2,256,502
Customer deposits	180,597	416,044
Billings in excess of cost and profit	1,929,151	351,289
Income taxes payable	5,500	5,000
Accrued Liabilities, Current	1,303,718	1,399,232
Line of credit	1,928,437	4,413,520
Current portion of finance lease liabilities	220,908	257,454
Current portion of long-term debt	119,734	109,193
Current liabilities of discontinued operations	0	186,789
Total current liabilities	6,632,493	9,395,023
Long-term liabilities
Long-term portion of operating lease liabilities	4,700	13,774
Long-term portion of finance lease liabilities	534,436	722,200
Long-term debt, excluding current portion	1,975,232	2,629,862
Total liabilities	9,146,861	12,760,859
Commitments and Contingencies (Notes 8, 9, 10 and 17)
Stockholders’ equity:
Undesignated preferred stock - $0.01 par value. Authorized 500,000 shares in 2024 and 2023; issued and outstanding 0 shares in 2024 and 2023.	0	0
Common stock – $0.01 par value. Authorized 9,500,000 shares in 2024 and 2023; issued 5,149,173 in 2024 and 5,106,922 in 2023	51,492	51,069
Additional paid-in capital	5,020,849	4,838,425
Retained earnings	7,328,628	7,021,253
Treasury stock, at cost (112,714 shares in 2024 and 94,256 shares in 2023)	(307,146)	(269,492)
Total stockholders’ equity	12,093,823	11,641,255
Total liabilities and stockholders’ equity	$ 21,240,684	$ 24,402,114