Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Cash flows from operations:
Net income	$ 1,551,376	$ 2,665,087
Adjustments to reconcile net income to net cash provided by operating activities:
Stock based compensation	29,812	34,519
Impairment of Asset Available for Sale		94,647
Gain on disposal of property, plant, and equipment	(601,678)
Depreciation expense	704,457	792,910
Amortization expense	0	60,000
Bad debt expense (recovery)	7,516	(7,654)
Deferred income taxes	(111,138)	(41,721)
(Increase) decrease in:
Accounts receivable	(229,412)	(739,984)
Inventories	769,641	(130,617)
Income taxes receivable	(108,513)
Other current assets	67,652	(110,870)
Increase (decrease) in:
Accounts payable	151,885	312,584
Contracts in progress, net	(1,048,125)	1,114,286
Customer deposits	(84,795)	(106,184)
Income taxes payable	(821,301)	470,304
Accrued expenses	(279,721)	596,964
Net cash provided by (used in) operating activities	(2,344)	5,004,271
Cash flows from investing activities:
Purchases of property, plant, and equipment	(842,124)	(799,598)
Return of asset held for lease	146,902
Net cash (used in) investing activities	(3,342,839)	(3,803,163)
Proceeds from sale of Armstrong, IA land and Salem, SD building	835,534
Cash flows from financing activities:
Net change in line of credit	3,350,000	(1,388,965)
Proceeds from term debt	228,339	2,880,000
Repayment of term debt	(1,213,550)	(869,987)
Proceeds from the exercise of stock options	46,390	9,110
Dividends paid to stockholders	(404,655)	(403,585)
Net cash provided by financing activities	2,006,524	226,573
Net increase/(decrease) in cash	(1,338,659)	1,427,681
Cash at beginning of period	1,546,609	118,928
Cash at end of period	207,950	1,546,609
Interest	296,640	411,737
Income taxes	1,644,520	1,045,614
Universal Harvester [Member]
Cash flows from investing activities:
Purchase of assets		(3,003,565)
Ohio Metal Working Products [Member]
Cash flows from investing activities:
Purchase of assets	(3,171,805)
Argo Trend [Member]
Cash flows from investing activities:
Purchase of assets	$ (311,346)