Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	May 31, 2014	May 31, 2013
Cash flows from operations:
Net income (loss)	$ (5,159)	$ 1,333,500
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Stock based compensation	14,504	29,812
(Gain) on disposal of property, plant, and equipment	(958)	(604,245)
Depreciation expense	441,230	370,084
Bad debt expense (recovery)	10,939	3,229
Deferred income taxes	(25,003)	(97,147)
(Increase) decrease in:
Accounts receivable	(288,590)	408,979
Inventories	(945,760)	(492,088)
Income taxes receivable	(269,169)
Other current assets	(371,738)	(28,120)
Increase (decrease) in:
Accounts payable	223,896	208,415
Contracts in progress, net	(8,375)	(995,529)
Customer deposits	908,211	759,838
Income taxes payable		(622,085)
Accrued expenses	(133,590)	(279)
Net cash provided by (used in) operating activities	(449,562)	274,364
Cash flows from investing activities:
Purchases of property, plant, and equipment	(611,211)	(210,269)
Proceeds from sale of property	958	835,536
Net cash provided by (used in) investing activities	(610,253)	625,267
Cash flows from financing activities:
Net change in line of credit	714,740
Proceeds from term debt	1,000,000	228,339
Repayment of term debt	(620,243)	(551,307)
Proceeds from the exercise of stock options	7,760
Net cash provided by (used in) financing activities	1,102,257	(322,968)
Net increase in cash	42,442	576,663
Cash at beginning of period	207,950	1,546,609
Cash at end of period	250,392	2,123,272
Cash paid during the period for:
Interest	176,564	169,202
Income taxes	$ 291,822	$ 1,356,942