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Note 11 - Segment Information (Details) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
CVD [Member] | Operating Segments [Member]
Revenue		$ 3,243,095	$ 9,969,113	$ 7,335,877	$ 18,547,485
Pretax (loss)		(758,035)	846,558	(1,363,640)	1,635,645
SDC [Member] | Operating Segments [Member]
Revenue		581,710	1,826,896	1,505,688	3,230,953
Pretax (loss)		(237,921)	651,637	(173,770)	1,051,699
Intersegment Eliminations [Member]
Revenue	[1]	(81,023)	(1,361,856)	(94,350)	(1,651,841)
Pretax (loss)
Revenue		3,743,782	10,434,153	8,747,215	20,126,597
Pretax (loss)		$ (995,956)	$ 1,498,195	$ (1,537,410)	$ 2,687,344
[1] All elimination entries represent intersegment revenues eliminated in consolidation for external financial reporting.

X

- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

X

- Details

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Namespace Prefix:
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