Note 14 - Segment Information (Details) - USD ($)		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
CVD [Member] | Operating Segments [Member]
Assets		$ 41,204,471	$ 44,953,847
Revenue		35,473,057	23,831,036
Interest Expense		85,765	100,829
Depreciation and amortization		764,467	728,995
Capital expenditures		212,140	571,240
Pretax earnings		3.61628	(4,877,892)
SDC [Member] | Operating Segments [Member]
Assets		3,619,304	4,733,926
Revenue		5,674,258	5,580,212
Interest Expense		6,336	8,589
Depreciation and amortization		62,062	68,933
Capital expenditures		36,165	46,521
Pretax earnings		1,046,911	1,168,422
Intersegment Eliminations [Member]
Assets		(2,017,571)	(4,131,301)
Revenue		(2,181,928)	(1,420,785)
Assets		42,806,204	45,556,472
Revenue		38,965,387	27,990,463
Interest Expense		92,101	109,418
Depreciation and amortization	[1]	826,529	797,928
Capital expenditures		248,305	617,761
Pretax earnings		$ 4,663,191	$ (3,709,470)

[1] Includes amortization expense of $24,759 and $20,007 for the years ending December 31, 2015 and 2014, respectively. Such amortization expense relates to other capitalized and intangible assets.