Description of Business (Liquidity and Capital Resources) (Details) - USD ($) $ / shares in Units, shares in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 15, 2015	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Apr. 17, 2015	Apr. 16, 2015	Jan. 02, 2015	Dec. 10, 2014	Oct. 22, 2014	Sep. 30, 2014	Sep. 17, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Shares acquired (in shares)	6.9
Average cost per share (in usd per share)	$ 6.55
Repurchases of common stock	$ 45,000,000
Repurchase costs	$ 700,000
Cash and cash equivalents		$ 110,031,000	$ 140,965,000	$ 110,031,000	$ 140,965,000	$ 111,885,000						$ 20,687,000
Working capital		133,000,000		133,000,000
Net income		$ 3,982,000	$ 3,052,000	$ 4,969,000	$ 59,180,000
Photovoltaics Business [Member] | Photovoltaics [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price										$ 150,000,000			$ 150,000,000
Working capital adjustment						$ 100,000
Digital Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price											$ 17,500,000
Asset sale, promissory note, principal amount								$ 15,500,000	$ 1,500,000
Accrued interest on note receivable							$ 200,000
Sixth Amendment [Member] | Revolving Credit Facility [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Line of credit facility, maximum borrowing capacity										$ 15,000,000.00