Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	May 31, 2012	May 31, 2011
Cash flows from operations:
Net income (loss)	$ 1,129,479	$ (193,828)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Stock based compensation	34,518	52,473
Depreciation expense	377,578	372,291
Amortization expense	30,000	30,000
Deferred income taxes	56,952	138,000
(Increase) decrease in:
Accounts receivable	(5,397,295)	(578,145)
Inventories	(559,868)	(770,053)
Income taxes receivable		(270,388)
Other current assets	(124,309)	(153,380)
Increase (decrease) in:
Accounts payable	1,354,166	(49,395)
Contracts in progress, net	1,612,755	416,226
Customer deposits	1,141,274	1,636,490
Income taxes payable	72,042	(594,816)
Accrued expenses	393,201	(167,174)
Net cash provided by (used in) operating activities	120,493	(131,699)
Cash flows from investing activities:
Purchases of property, plant, and equipment	(203,129)	(434,065)
Net change in asset held for lease		(229,095)
Purchase of assets of Universal Harvester	(3,003,565)
Net cash (used in) investing activities	(3,206,694)	(663,160)
Cash flows from financing activities:
Proceeds from line of credit borrowings	9,271,000	6,510,386
Repayment of line of credit borrowings	(8,573,965)	(5,656,000)
Payments of notes payable to bank	(328,204)	(300,432)
Proceeds from term debt	2,880,000
Proceeds from the exercise of stock options	9,110	38,950
Net cash (used in) provided by financing activities	3,257,941	592,904
Net increase (decrease) in cash	171,740	(201,955)
Cash at beginning of period	118,924	317,103
Cash at end of period	290,664	115,148
Cash paid/(received) during the period for:
Interest	198,718	201,848
Income taxes	436,900	640,850
Universal Harvester acquisition:
Inventories	902,589
Equipment, tools and dies	364,053
Goodwill and intangible assets	699,900
Land and Building	1,072,573
Non-Cash Activity: Stock issued for purchase of assets	(35,550)
Cash paid	$ 3,003,565