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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) | 9 Months Ended
--- | ---
Aug. 31, 2013 | Aug. 31, 2012
Cash flows from operations: |  |
Net income | $ 1,359,894 | $ 2,108,929
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock based compensation | 29,812 | 34,518
Gain on disposal of property, plant, and equipment | (603,454) |
Depreciation expense | 558,292 | 587,792
Amortization expense | 0 | 45,000
Bad debt expense | 3,880 | 0
Deferred income taxes | (97,147) | (33,956)
(Increase) decrease in: |  |
Accounts receivable | 309,986 | (4,201,297)
Inventories | 855,817 | 435,454
Other current assets | 40,991 | (156,733)
Increase (decrease) in: |  |
Accounts payable | 234,643 | 368,143
Contracts in progress, net | (1,304,566) | 1,966,990
Customer deposits | (36,567) | (244,726)
Income taxes payable | (476,695) | 494,949
Accrued expenses | (178,581) | 802,745
Net cash provided by operating activities | 696,305 | 2,207,808
Cash flows from investing activities: |  |
Purchases of property, plant, and equipment | (684,809) | (533,123)
Proceeds from sale of Armstrong, IA land and Salem, SD building | 835,536 |
Cash flows from financing activities: |  |
Payments of line of credit to bank |  | (746,565)
Proceeds from term debt | 228,339 | 2,880,000
Repayment of term debt | (907,939) | (596,753)
Proceeds from the exercise of stock options | 30,870 | 9,110
Net cash provided by (used in) financing activities | (648,730) | 1,545,792
Net increase/(decrease) in cash | (113,044) | 216,912
Cash at beginning of period | 1,546,609 | 118,924
Cash at end of period | 1,433,565 | 335,836
Cash paid during the period for: |  |
Interest | 229,581 | 331,818
Income taxes | 1,234,345 | 443,926
Universal Harvester [Member] |  |
Cash flows from investing activities: |  |
Purchase of assets |  | (3,003,565)
Argo Trend [Member] |  |
Cash flows from investing activities: |  |
Purchase of assets | (311,346) |
Net cash provided by (used in) investing activities | $ (160,619) | $ (3,536,688)

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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for a borrowing supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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