Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Goodwill) (Details)

v3.5.0.2
Summary of Significant Accounting Policies (Goodwill) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended 20 Months Ended
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2016
Goodwill [Roll Forward]      
Gross balance, beginning of year   $ 11,808  
Accumulated impairment losses, beginning of year   (1,273)  
Net balance, beginning of year   10,535  
Reallocation of goodwill   600  
Net exchange differences   (16)  
Gross balance, end of year $ 11,808 12,388 $ 12,388
Accumulated impairment losses, end of year (1,273) (1,269) (1,269)
Net balance, end of year 10,535 11,119 11,119
Solar      
Goodwill [Roll Forward]      
Gross balance, beginning of year   6,617  
Accumulated impairment losses, beginning of year   (1,273)  
Net balance, beginning of year   5,344  
Reallocation of goodwill   0  
Net exchange differences   (16)  
Gross balance, end of year 6,617 6,597 6,597
Accumulated impairment losses, end of year (1,273) (1,269) (1,269)
Net balance, end of year 5,344 5,328 5,328
Semiconductor      
Goodwill [Roll Forward]      
Gross balance, beginning of year   4,463  
Accumulated impairment losses, beginning of year   0  
Net balance, beginning of year   4,463  
Reallocation of goodwill   600  
Net exchange differences   0  
Gross balance, end of year 4,463 5,063 5,063
Accumulated impairment losses, end of year 0 0 0
Net balance, end of year 4,463 5,063 5,063
Polishing      
Goodwill [Roll Forward]      
Gross balance, beginning of year   728  
Accumulated impairment losses, beginning of year   0  
Net balance, beginning of year   728  
Reallocation of goodwill   0  
Net exchange differences   0  
Gross balance, end of year 728 728 728
Accumulated impairment losses, end of year 0 0 0
Net balance, end of year 728 728 728
SoLayTech      
Segment Reporting Information [Line Items]      
Measurement period adjustments, increase (decrease) in goodwill 900    
BTU International, Inc (BTU) Merger      
Segment Reporting Information [Line Items]      
Measurement period adjustments, increase (decrease) in goodwill $ (200)   600
Goodwill [Roll Forward]      
Net balance, end of year   $ 5,063 $ 5,063