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Condensed Consolidated Statements Of Operations (USD $)
In Thousands, except Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Condensed Consolidated Statements Of Operations        
Revenue, net $ 11,427 $ 8,288 $ 23,495 $ 17,946
Cost of sales 9,921 7,907 20,792 16,838
Gross profit 1,506 381 2,703 1,108
Operating expenses:        
General and administrative 1,859 1,230 2,916 2,372
Selling 614 617 1,225 1,168
Research and development 313 274 436 421
Total operating expenses 2,786 2,121 4,577 3,961
Loss from operations (1,280) (1,740) (1,874) (2,853)
Other income (expense):        
Equity in income of joint ventures 261 287 498 923
Joint venture management related expenses (117) (106) (246) (222)
Interest expense (42) (29) (79) (59)
Other, net (13) (170) (23) (177)
Total other income (expense) 89 (18) 150 465
Loss before benefit for income taxes (1,191) (1,758) (1,724) (2,388)
Income tax benefit (464) (615) (675) (836)
Net loss $ (727) $ (1,143) $ (1,049) $ (1,552)
Net loss per common share:        
Basic and diluted $ (0.09) $ (0.15) $ (0.13) $ (0.20)
Weighted-average shares:        
Basic and diluted 7,821,646 7,745,365 7,800,060 7,732,010