Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Cash flows from operations:
Net (loss) from continuing operations	$ (527,398)	$ (253,642)
Net income (loss) from discontinued operations	(39,054)	3,613
Adjustments to reconcile net (loss) to net cash provided by operating activities:
Stock based compensation	49,558	26,557
Unrealized foreign currency gain (loss)	(6,698)	11,022
(Gain)/Loss on disposal of property, plant, and equipment	(8,896)	2,463
Depreciation and amortization expense	189,654	170,789
Bad debt expense	(16,002)	5,601
Deferred income taxes	207,645	(107,034)
Changes in assets and liabilities:
Accounts receivable	99,194	(44,089)
Inventories	898,217	295,975
Income taxes receivable		(5,537)
Net investment in sales-type leases	(375,455)
Other assets	(150,301)	(255,629)
Accounts payable	255,821	80,634
Contracts in progress, net	26,065	59,422
Customer deposits	22,272	503,702
Accrued expenses	(117,269)	(166,649)
Net cash provided by operating activities - continuing operations	546,407	323,585
Net cash (used in) operating activities - discontinued operations	(51,509)	(22,039)
Net cash provided by operating activities	494,898	301,546
Cash flows from investing activities:
Purchases of property, plant, and equipment	(64,401)	(195,020)
Net proceeds from sale of assets	29,316	12,190
Net cash (used in) investing activities - continuing operations	(35,085)	(182,830)
Net cash provided by investing activities - discontinued operations		38,736
Net cash (used in) investing activities	(35,085)	(144,094)
Cash flows from financing activities:
Net change in line of credit	502,000	250,000
Repayment of term debt	(53,827)	(182,119)
Repurchases of common stock	(21,310)	(5,989)
Net cash (used in) financing activities - continuing operations	(577,137)	(438,108)
Net cash (used in) financing activities - discontinued operations	(2,262)	(32,281)
Net cash (used in) financing activities	(579,399)	(470,389)
Net increase (decrease) in cash	(119,586)	(312,937)
Cash at beginning of period	212,400	1,063,716
Cash at end of period	92,814	750,779
Supplemental disclosures of cash flow information:
Interest	48,506	71,338
Income taxes	$ 838	$ 3,125