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Interim Financial Statements (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2011
Mar. 31, 2011
Jun. 30, 2011
Summary of the effects of deconsolidation of Eltmann      
Accumulated other comprehensive income   $ 551  
Gain from deconsolidation of bankrupt subsidiary 0 209 209
Cash   (979)  
Accounts receivable   (3,388)  
Inventory   (2,407)  
Other assets   (193)  
Property, plant and equipment   (1,343)  
Reduction of total assets   (8,310)  
Accounts payable   (1,947)  
Accrued salaries   (1,500)  
Accrued pension   (5,623)  
Reduction of total liabilities and stockholders' equity   $ (8,519)