Note 12 - Segment Reporting (Detail) - Table of Segment Reporting Revenue and Pretax Income (USD $)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Revenue	$ 3,450,018		$ 7,154,951
Pretax income (loss)	(902,386)		1,059,796
CVD [Member]
Revenue	2,691,756		6,216,999
Pretax income (loss)	(915,304)		822,188
SDC [Member]
Revenue	869,689		1,473,941
Pretax income (loss)	12,918		237,608
Intersegment Elimination [Member]
Revenue	$ (111,427)	[1]	$ (535,989)	[1]

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