Note 11 - Segment Information (Details) - USD ($)		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
CVD [Member] | Operating Segments [Member]
Revenue		$ 4,092,781	$ 8,578,372
Pretax (loss)/income		(605,594)	789,087
SDC [Member] | Operating Segments [Member]
Revenue		923,979	1,404,057
Pretax (loss)/income		64,151	400,062
Intersegment Eliminations [Member]
Revenue	[1]	(13,327)	(289,985)
Revenue		5,003,433	9,692,444
Pretax (loss)/income		$ (541,454)	$ 1,189,149

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