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Note 14 - Segment Reporting (Detail) - Schedule of Segment Reporting Revenue and Pretax Income (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Revenue $ 7,093,785 $ 7,507,717 $ 14,248,736 $ 13,713,417
Pretax income 480,640 1,163,434 1,540,436 2,074,395
CVD [Member]
       
Revenue 6,505,330 6,482,466 12,722,329 12,194,241
Pretax income 400,325 858,632 1,222,513 1,710,438
SDC [Member]
       
Revenue 976,951 1,652,531 2,450,893 2,685,678
Pretax income 80,315 304,802 317,923 363,957
Intersegment Elimination [Member]
       
Revenue $ (388,496) $ (627,280) $ (924,486) $ (1,166,502)