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Geographic Regions (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenue $ 6,925 $ 10,398 $ 8,118 $ 9,357 $ 10,945 $ 24,300 $ 21,566 $ 24,728 $ 34,798 $ 81,539 $ 246,705
Operating income (loss)                 (19,994) (32,984) 38,279
Net long-lived assets 11,066       12,387       11,066 12,387  
The Netherlands
                     
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenue                 17,615 48,294 195,404
Operating income (loss)                 (11,139) (18,686) 28,724
Net long-lived assets 8,733       9,555       8,733 9,555  
United States
                     
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenue                 11,855 27,638 24,079
Operating income (loss)                 (4,346) (1,025) (1,742)
Net long-lived assets 1,160       1,448       1,160 1,448  
France
                     
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenue                 5,328 5,584 26,347
Operating income (loss)                 (815) (3,041) 12,992
Net long-lived assets 552       676       552 676  
China
                     
Revenues from External Customers and Long-Lived Assets [Line Items]                      
Net revenue                 0 23 875
Operating income (loss)                 (3,694) (10,232) (1,695)
Net long-lived assets $ 621       $ 708       $ 621 $ 708