Note 12 - Segment Reporting (Details) - Table of Segment Reporting Revenue and Pretax Income (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 4,706,672		$ 4,696,409		$ 13,004,297		$ 18,945,145
Pretax income (loss)	(613,957)		292,895		(511,820)		1,833,331
CVD [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	3,368,613		4,024,555		9,824,980		16,746,884
Pretax income (loss)	(854,063)		195,198		(979,148)		1,417,711
SDC [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	1,425,304		881,127		3,473,665		3,332,020
Pretax income (loss)	240,106		97,697		467,328		415,620
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ (87,245)	[1]	$ (209,273)	[1]	$ (294,348)	[1]	$ (1,133,759)	[1]

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