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Commitments And Contingencies (Details)
 3 Months Ended 12 Months Ended 3 Months Ended
Jun. 30, 2011
USD ($)
Mar. 31, 2011
USD ($)
Jul. 31, 2011
USD ($)
Jun. 30, 2011
Chinese Yen Line Of Credit [Member]
USD ($)
Jun. 30, 2011
Chinese Yen Line Of Credit [Member]
CNY
Jul. 31, 2011
Chinese Yen Line Of Credit [Member]
CNY
Jun. 30, 2011
Euro Line Of Credit [Member]
USD ($)
Jun. 30, 2011
Euro Line Of Credit [Member]
EUR (€)
Loss to cost of revenue from materials purchase in excess of demand $ 1,100,000              
Adverse purchase commitments included in purchase commitment 40,300,000              
Number of putative securities complaints 6              
Amount of loss or damages has been incurred 0              
Number of outstanding performance bonds 9              
Total value of outstanding performance bonds 2,300,000              
Performance bond latest expiration date March 2014              
Restricted cash 6,516,000 5,566,000            
Restricted cash included in long term assets 2,857,000              
Bank guarantees and letters of credit 2,500,000 2,500,000            
Unused, unsecured lines of credit       17,800,000 114,800,000   2,300,000 1,600,000
Line of credit which will not be renewed     15,500,000     100,000,000    
Net borrowings on lines of credit outstanding $ 4,641,000              
Line of Credit Facility, Expiration Date       August 2011 August 2011