Discontinued Operations (Income Statements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Photovoltaics Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 12,614	$ 73,226	$ 71,170
Cost of revenue	8,245	52,317	52,806
Gross profit	4,369	20,909	18,364
Operating expense	2,240	6,654	5,107
Other income	779	17	90
Gain on sale of equity method investment	0	0	4,800
Gain on sale of discontinued operations	86,958	0	0
Income from discontinued operations before income tax	89,866	14,272	18,147
Income tax expense (benefit)	(28,700)	(5,412)	(4,536)
Income from discontinued operations, net of tax	61,166	8,860	13,611
Digital Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	11,944	46,038	36,006
Cost of revenue	9,107	46,387	38,438
Gross profit	2,837	(349)	(2,432)
Operating expense	2,800	12,683	12,870
Flood-related insurance proceeds	0	0	(11,210)
Gain on sale of discontinued operations	1,994	0	0
Income from discontinued operations before income tax	2,031	(13,032)	(4,092)
Income tax expense (benefit)	2,175	4,942	1,023
Income from discontinued operations, net of tax	$ 4,206	$ (8,090)	$ (3,069)