Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Cash flows from operations:
Net (loss) from continuing operations	$ (1,662,523)	$ (1,251,190)
Adjustments to reconcile net (loss) to net cash provided by operating activities:
Stock based compensation	195,662	160,045
(Gain) Loss on disposal of property, plant, and equipment	(47,169)	(10,000)
Depreciation and amortization expense	648,084	774,068
Bad debt expense (recovery)	20,009	(1,402)
Deferred income taxes	(436,692)	(362,834)
Accrued interest on deferred debt payments	3,330
Changes in assets and liabilities:
Accounts receivable	(63,526)	(963,875)
Inventories	(244,091)	494,188
Net investment in sales-type leases	105,933	87,465
Other assets	(96,868)	(109,422)
Accounts payable	223,680	233,195
Contracts in progress, net	920,172	1,149,423
Customer deposits	16,972	114,368
Income taxes payable
Accrued expenses	58,088	62,613
Net cash (used in) operating activities	(358,939)	376,642
Cash flows from investing activities:
Purchases of property, plant, and equipment	(614,443)	(367,450)
Net proceeds from sale of assets	182,881	899,713
Net cash provided by (used in) investing activities	(431,562)	532,263
Cash flows from financing activities:
Net change in line of credit	811,000	596,000
Proceeds from term debt	1,692,900
Repayment of term debt	(63,808)	(293,974)
Repurchases of common stock	(26,536)	(17,398)
Net cash provided by (used in) financing activities	791,556	(907,372)
Net increase (decrease) in cash	1,055	1,533
Cash at beginning of period	3,145	3,512
Cash at end of period	4,200	5,045
Supplemental disclosures of cash flow information:
Interest	205,409	253,140
Income taxes	$ 30,394	$ 3,855