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Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Revenues $ 84,837 $ 52,216
Revenues – related parties 890 3,025
Cost of goods sold 70,956 45,387
Cost of goods sold – related parties 986 4,203
Distribution 864 519
Distribution – related parties 120 133
Gross profit 12,801 4,999
Selling, general and administrative expenses    
Compensation expense 749 809
Other expense 591 169
Related party expense 35 48
Research and development expenses 843 753
2,218 1,779
Income from operations 10,583 3,220
Interest and dividend income 1,140 776
Interest expense (6) (134)
Gain on marketable securities 314 95
Other expense (52) (5)
1,396 732
Income before income taxes 11,979 3,952
Provision for income taxes 4,866 1,236
Net income 7,113 2,716
Earnings per common share    
Basic (in Dollars per share) $ 0.17 $ 0.07
Diluted (in Dollars per share) $ 0.17 $ 0.07
Weighted average shares outstanding    
Basic (in Shares) 41,314,859 39,982,905
Diluted (in Shares) 41,493,135 40,131,086
Comprehensive Income    
Net income 7,113 2,716
Other comprehensive income, net of tax of $701 in 2012 and $618 in 2011 1,126 987
Comprehensive income $ 8,239 $ 3,703