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Note 14 - Segment Reporting - Segment Information (Details) - USD ($)
 12 Months Ended
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.