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Note 14 - Segment Reporting - Segment Information (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Assets |  | $ 45,604,692 |  | $ 41,131,704
Revenue |  | 20,955,347 |  | 38,965,387
Interest Expense |  | 79,861 |  | 92,101
Depreciation and amortization expense (1) | [1] | 813,657 |  | 826,529
Capital expenditures |  | 112,493 |  | 248,305
Pretax earnings/(loss) |  | (653,186) |  | 4,663,191
Operating Segments [Member] | CVD [Member] |  |  |  |
Assets |  | 44,783,126 |  | 39,529,971
Revenue |  | 18,568,132 |  | 35,473,057
Interest Expense |  | 78,322 |  | 85,765
Depreciation and amortization expense (1) |  | 750,680 |  | 764,467
Capital expenditures |  | 0 |  | 212,140
Pretax earnings/(loss) |  | 0 |  | 3,616,280
Operating Segments [Member] | SDC [Member] |  |  |  |
Assets |  | 4,558,111 |  | 3,619,304
Revenue |  | 2,934,831 |  | 5,674,258
Interest Expense |  | 1,539 |  | 6,336
Depreciation and amortization expense (1) |  | 62,978 |  | 62,062
Capital expenditures |  | 5,850 |  | 36,165
Pretax earnings/(loss) |  | (441,610) |  | 1,046,911
Intersegment Eliminations [Member] |  |  |  |
Assets |  | (3,680,845) | [2] | (2,017,571)
Revenue |  | $ (547,616) | [2] | $ (2,181,928)
[1] | Includes amortization expense of $31,356 and $24,759 for the years ending December 31, 2016 and 2015, respectively. Such amortization expense relates to other capitalized and intangible assets.
[2] | All elimination entries represent intersegment revenues eliminated in consolidation for external financial reporting.

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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 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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