Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Cash flows from operations:
Net income	$ 2,108,929	$ 826,002
Adjustments to reconcile net income to net cash provided by operating activities:
Stock based compensation	34,518	58,311
Depreciation expense	587,792	560,931
Amortization expense	45,000	45,000
Deferred income taxes	(33,956)	115,312
(Increase) decrease in:
Accounts receivable	(4,201,297)	(851,843)
Inventories	435,454	659,216
Other current assets	(156,733)	(52,189)
Increase (decrease) in:
Accounts payable	368,143	(309,943)
Contracts in progress, net	1,966,990	555,649
Customer deposits	(244,726)	(155,121)
Income taxes payable	494,949	(539,276)
Accrued expenses	802,745	(60,532)
Net cash provided by operating activities	2,207,808	851,518
Cash flows from investing activities:
Purchases of property, plant, and equipment	(533,123)	(730,326)
Net change in asset held for lease		(229,095)
Purchase of assets of Universal Harvester	(3,003,565)
Net cash (used in) investing activities	(3,536,688)	(959,421)
Cash flows from financing activities:
Proceeds from line of credit borrowings	13,576,400	10,035,387
Repayment of line of credit borrowings	(14,322,965)	(9,644,000)
Payments of notes payable to bank	(746,565)	(453,443)
Proceeds from term debt	2,880,000
Repayment of term debt	(596,753)
Proceeds from the exercise of stock options	9,110	66,749
Net cash provided by financing activities	1,545,792	396,080
Net increase in cash	216,912	288,177
Cash at beginning of period	118,924	317,103
Cash at end of period	335,836	605,280
Cash paid during the period for:
Interest	331,818	321,921
Income taxes	443,926	665,203
Universal Harvester acquisition:
Inventories	902,589
Equipment, tools and dies	364,053
Goodwill and intagible 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