Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Cash flows from operations:
Net (loss) from continuing operations	$ (605,932)	$ (527,398)
Net income (loss) from discontinued operations		39,054
Adjustments to reconcile net (loss) to net cash provided by operating activities:
Stock based compensation	65,546	49,558
Unrealized foreign currency loss		(6,698)
Gain on disposal of property, plant, and equipment	(15,086)	(8,896)
Depreciation and amortization expense	289,072	189,654
Bad debt expense (recovery)	8,026	(16,002)
Deferred income taxes	(170,796)	207,645
Changes in assets and liabilities:
Accounts receivable	(132,985)	99,194
Inventories	48,417	898,217
Net investment in sales-type leases	12,791	(375,455)
Other assets	(177,118)	(150,301)
Accounts payable	(7,571)	255,821
Contracts in progress, net	(462,520)	26,065
Customer deposits	569,168	22,272
Income taxes payable	(4,371)
Accrued expenses	(130,048)	(117,269)
Net cash provided by (used in) operating activities - continuing operations	(713,407)	546,407
Net cash (used in) operating activities - discontinued operations		(51,509)
Net cash provided by (used in) operating activities	(713,407)	494,898
Cash flows from investing activities:
Purchases of property, plant, and equipment	(53,056)	(64,401)
Net proceeds from sale of assets	893,713	29,316
Net cash provided by (used in) investing activities	840,657	(35,085)
Cash flows from financing activities:
Net change in line of credit	(136,000)	502,000
Repayment of term debt	(252,697)	(53,827)
Repurchases of common stock	(10,820)	(21,310)
Net cash (used in) financing activities - continuing operations	(127,517)	(577,137)
Net cash (used in) financing activities - discontinued operations		(2,262)
Net cash (used in) financing activities	(127,517)	(579,399)
Net increase (decrease) in cash	(267)	(119,586)
Cash at beginning of period	3,512	212,400
Cash at end of period	3,245	92,814
Supplemental disclosures of cash flow information:
Interest	81,186	75,787
Income taxes	$ 260	$ 838