Note 12 - Segment Information (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CVD [Member] | Operating Segments [Member]
Revenue		$ 9,373,890	$ 7,693,131	$ 27,921,375	$ 16,339,298
Pretax income		687,094	807,397	2,322,739	410,301
SDC [Member] | Operating Segments [Member]
Revenue		1,445,257	1,810,328	4,676,210	4,137,957
Pretax income		167,539	389,532	1,219,238	878,648
Intersegment Eliminations [Member]
Revenue	[1]	$ (173,323)	$ (636,301)	$ (1,825,164)	$ (1,117,708)
Pretax income
Revenue		$ 10,645,824	$ 8,867,158	$ 30,772,421	$ 19,359,547
Pretax income		$ 854,633	$ 1,196,929	$ 3,541,977	$ 1,288,949

[1] All elimination entries represent intersegment revenues eliminated in consolidation for external financial reporting.