Discontinued Operations (Income Statements) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Photovoltaics Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue			$ 73,226
Cost of revenue			52,317
Gross profit			20,909
Operating (income) expense			6,654
Other income			17
Gain on sale of discontinued operations			0
Income (loss) from discontinued operations before income tax benefit			14,272
Income tax benefit (expense)			(5,412)
Income (loss) from discontinued operations, net of tax			8,860
Digital Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue			46,038
Cost of revenue			46,387
Gross profit			(349)
Operating (income) expense			12,683
Gain on sale of discontinued operations			0
Income (loss) from discontinued operations before income tax benefit			(13,032)
Income tax benefit (expense)			4,942
Income (loss) from discontinued operations, net of tax			(8,090)
Discontinued Operations, Disposed of by Sale [Member] | Photovoltaics Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 0	$ 12,614
Cost of revenue	(159)	8,245
Gross profit	159	4,369
Operating (income) expense	(868)	2,240
Other income	0	779
Gain on sale of discontinued operations	0	86,958
Income (loss) from discontinued operations before income tax benefit	1,027	89,866
Income tax benefit (expense)	20	(28,700)
Income (loss) from discontinued operations, net of tax	1,047	61,166
Discontinued Operations, Disposed of by Sale [Member] | Digital Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0	11,944
Cost of revenue	(500)	9,107
Gross profit	500	2,837
Operating (income) expense	(292)	2,800
Other income	3,804	0	$ 0
Gain on sale of discontinued operations	0	1,994
Income (loss) from discontinued operations before income tax benefit	4,596	2,031
Income tax benefit (expense)	4	2,175
Income (loss) from discontinued operations, net of tax	$ 4,600	$ 4,206