Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
Feb. 28, 2015	Feb. 28, 2014
Cash flows from operations:
Net income (loss)	$ 168,195us-gaap_NetIncomeLoss	$ (258,312)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Stock based compensation	13,145us-gaap_ShareBasedCompensation
Loss on disposal of property, plant, and equipment	7,269
Depreciation expense	229,454us-gaap_Depreciation	212,989us-gaap_Depreciation
Bad debt expense (recovery)	7,626us-gaap_ProvisionForDoubtfulAccounts	(5,966)us-gaap_ProvisionForDoubtfulAccounts
Deferred income taxes	(14,787)
Changes in assets and liabilities:
Accounts receivable	167,643	594,980
Inventories	(1,043,896)us-gaap_IncreaseDecreaseInInventories	(998,188)us-gaap_IncreaseDecreaseInInventories
Income taxes receivable	92,513	(116,824)
Other assets	(330,677)	(381,292)
Accounts payable	171,526	250,684
Contracts in progress, net	91,316	22,243
Customer deposits	691,425	1,134,311
Accrued expenses	(173,280)	(288,108)
Net cash provided by operating activities	77,472	166,517
Cash flows from investing activities:
Purchases of property, plant, and equipment	(86,528)	(432,032)
Proceeds from sale of assets	14,456
Net cash (used in) investing activities	(72,072)	(432,032)
Cash flows from financing activities:
Net change in line of credit	904,261	452,810
Repayment of term debt	(316,909)us-gaap_RepaymentsOfLongTermDebt	(308,330)us-gaap_RepaymentsOfLongTermDebt
Dividends paid to stockholders	(202,428)us-gaap_PaymentsOfDividendsCommonStock
Net cash provided by financing activities	384,925	144,480
Net increase/(decrease) in cash	390,325us-gaap_CashPeriodIncreaseDecrease	(121,035)us-gaap_CashPeriodIncreaseDecrease
Cash at beginning of period	511,716	207,950
Cash at end of period	902,041	86,915
Supplemental disclosures of cash flow information:
Interest	80,860us-gaap_InterestPaid	53,939us-gaap_InterestPaid
Income taxes		$ 32,902us-gaap_IncomeTaxesPaid

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.