Summary of Significant Accounting Policies (Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	$ 13,291
Goodwill, accumulated impairment loss, beginning of year	(4,810)
Goodwill, net, beginning of year	8,481
Exchange differences, net	(158)
Goodwill, gross, end of year	13,043
Goodwill, accumulated impairment loss, end of year	(4,720)
Goodwill, net, end of year	8,323
Solar and Semiconductor
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	12,563
Goodwill, accumulated impairment loss, beginning of year	(4,810)
Goodwill, net, beginning of year	7,753
Exchange differences, net	(158)
Goodwill, gross, end of year	12,315
Goodwill, accumulated impairment loss, end of year	(4,720)
Goodwill, net, end of year	7,595
Polishing Supplies and Equipment
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	728
Goodwill, accumulated impairment loss, beginning of year	0
Goodwill, net, beginning of year	728
Exchange differences, net	0
Goodwill, gross, end of year	728
Goodwill, accumulated impairment loss, end of year	0
Goodwill, net, end of year	$ 728