Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	May. 31, 2015	May. 31, 2014
Cash flows from operations:
Net income (loss)	$ 399,816	$ (5,159)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Stock based compensation	28,484	14,504
Loss on disposal of property, plant, and equipment	6,955	(958)
Depreciation expense	459,412	441,230
Bad debt expense (recovery)	3,240	10,939
Deferred income taxes	(72,912)	(25,003)
Changes in assets and liabilities:
Accounts receivable	26,736	(288,590)
Inventories	(881,977)	(945,760)
Income taxes receivable	100,417	(269,169)
Other assets	(319,737)	(371,738)
Accounts payable	64,306	223,896
Contracts in progress, net	(37,362)	(8,375)
Customer deposits	607,275	908,211
Income taxes payable	10,150
Accrued expenses	(88,671)	(133,590)
Net cash provided by (used in) operating activities	306,132	(449,562)
Cash flows from investing activities:
Purchases of property, plant, and equipment	(139,994)	(611,211)
Proceeds from sale of assets	14,456	958
Net cash (used in) investing activities	(125,538)	(610,253)
Cash flows from financing activities:
Net change in line of credit	749,772	714,740
Proceeds from term debt		1,000,000
Repayment of term debt	(637,931)	(620,243)
Proceeds from the exercise of stock options		7,760
Dividends paid to stockholders	(202,428)
Net cash provided by (used in) financing activities	(90,586)	1,102,257
Net increase in cash	90,008	42,442
Cash at beginning of period	511,716	207,950
Cash at end of period	601,724	250,392
Supplemental disclosures of cash flow information:
Interest	160,803	176,564
Income taxes	$ 205,296	$ 291,822