Note 12 - Segment Reporting (Details) - Table of Segment Reporting Revenue and Pretax Income (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 4,847,606		$ 7,093,785		$ 8,297,624		$ 14,248,736
Pretax income (loss)	1,004,518		480,640		102,132		1,540,436
CVD [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	3,764,610		6,505,330		6,456,366		12,722,329
Pretax income (loss)	790,214		400,325		(125,090)		1,222,513
SDC [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	1,178,672		976,951		2,048,361		2,450,893
Pretax income (loss)	214,304		80,315		227,222		317,923
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ (95,676)	[1]	$ (388,496)	[1]	$ (207,103)	[1]	$ (924,486)	[1]

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