Note 11 - Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2017

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	CVD			SDC			Eliminations *			Consolidated
201 7
Assets	$	41,615,403		$	5,977,491		$	(1,789,511	)	$	45,803,383
Revenue	$	8,862,726		$	2,548,612		$	(579,609	)	$	10,831,729
Pretax income		1,055,683			848,511						1,904,194
201 6
Assets	$	46,147,895		$	4,316,826		$	(2,960,808	)	$	47,503,913
Revenue	$	4,253,544		$	846,696		$	(216,729	)	$	4,883,511
Pretax income		(180,638	)		(108,076	)					(288,714	)
December 31, 2016
Assets	$	43,300,131		$	4,558,111		$	(2,253,550	)	$	45,604,692

	CVD			SDC			Eliminations *			Consolidated
2017
Revenue	$	26,847,732		$	6,360,762		$	(1,896,439	)	$	31,312,055
Pretax income		3,403,907			2,039,111						5,443,018
201 6
Revenue	$	11,589,421		$	2,352,384		$	(311,079	)	$	13,630,726
Pretax (loss)		(1,544,278	)		(281,846	)					(1,826,124	)