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Note 14 - Segment Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
CVD [Member] | Operating Segments [Member] |  |  |
Assets |  | $ 41,204,471 | $ 44,953,847
Revenue |  | 35,473,057 | 23,831,036
Interest Expense |  | 85,765 | 100,829
Depreciation and amortization |  | 764,467 | 728,995
Capital expenditures |  | 212,140 | 571,240
Pretax earnings |  | 3.61628 | (4,877,892)
SDC [Member] | Operating Segments [Member] |  |  |
Assets |  | 3,619,304 | 4,733,926
Revenue |  | 5,674,258 | 5,580,212
Interest Expense |  | 6,336 | 8,589
Depreciation and amortization |  | 62,062 | 68,933
Capital expenditures |  | 36,165 | 46,521
Pretax earnings |  | 1,046,911 | 1,168,422
Intersegment Eliminations [Member] |  |  |
Assets |  | (2,017,571) | (4,131,301)
Revenue |  | (2,181,928) | (1,420,785)
Assets |  | 42,806,204 | 45,556,472
Revenue |  | 38,965,387 | 27,990,463
Interest Expense |  | 92,101 | 109,418
Depreciation and amortization | [1] | 826,529 | 797,928
Capital expenditures |  | 248,305 | 617,761
Pretax earnings |  | $ 4,663,191 | $ (3,709,470)
[1] | Includes amortization expense of $24,759 and $20,007 for the years ending December 31, 2015 and 2014, respectively. Such amortization expense relates to other capitalized and intangible assets.

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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