Description of Business (Liquidity and Capital Resources) (Details) - USD ($) $ / shares in Units, shares in Millions			3 Months Ended		9 Months Ended
	Jun. 15, 2015	Oct. 22, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Apr. 30, 2015	Apr. 16, 2015	Sep. 17, 2014
Auction Market Preferred Securities, Stock Series [Line Items]
Cash and cash equivalents			$ 114,100,000		$ 114,100,000
Working capital			126,400,000		126,400,000
Net income (loss)			2,440,000	$ (3,150,000)	61,620,000	$ (10,636,000)
Stock repurchase program, authorized amount							$ 45,000,000
Common stock shares repurchased (shares)	6.9
Treasury stock, purchase price (USD per share)	$ 6.55
Repurchase of common stock, excluding fees and expenses	$ 45,000,000				45,618,000	$ 0
Treasury stock, costs incurred	$ 600,000
Photovoltaics Business | Photovoltaics
Auction Market Preferred Securities, Stock Series [Line Items]
Asset purchase agreement, selling price									$ 150,000,000
Working capital adjustment, payment			100,000
Digital Products Business
Auction Market Preferred Securities, Stock Series [Line Items]
Asset purchase agreement, selling price		$ 17,500,000
Asset sale, cash consideration		1,500,000
Asset sale, promissory note, principal amount		$ 16,000,000						$ 15,500,000
Asset sale, promissory note, accrued interest								$ 200,000
Sixth Amendment | Revolving Credit Facility
Auction Market Preferred Securities, Stock Series [Line Items]
Line of credit facility, maximum borrowing capacity			15,000,000.00		15,000,000.00
LIBOR Rate Loan | Revolving Credit Facility
Auction Market Preferred Securities, Stock Series [Line Items]
Line of credit facility, maximum borrowing capacity			$ 35,000,000		$ 35,000,000