CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Paid-in Capital	Accumulated Deficit
Stockholders' equity at Sep. 30, 2010	$ 397,101	$ 15	$ 618,673	$ (221,587)
Stockholders' equity (shares) at Sep. 30, 2010		15,134,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(204,859)
Amortization of nonvested stock option awards	3,813		3,813
Amortization of stock option awards	3,357		3,357
Tax deficiency from stock transactions	(523)		(523)
Shares issued under employee stock plans, net (shares)		16,000
Shares issued under employee stock plans, net	101	0	101
Return and retirement of unvested & vested restricted stock (shares)		(22,000)
Return and retirement of unvested & vested restricted stock	(440)		(440)
Common stock redeemed (shares)		(10,000)
Common stock redeemed	(170)		(170)
Stockholders' equity at Sep. 30, 2011	198,380	15	624,811	(426,446)
Stockholders' equity (shares) at Sep. 30, 2011		15,118,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(145,326)			(145,326)
Tender Offer of Mandatory Convertible & TEU (debt to stock conversion) (shares)		4,969,000
Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments	56,675	5	56,670
Amortization of nonvested stock option awards	2,569		2,569
Amortization of stock option awards	1,459		1,459
Tax deficiency from stock transactions	(85)		(85)
Shares issued under employee stock plans, net (shares)		124,000
Shares issued under employee stock plans, net	0	0	0
Common stock issued (shares)		4,400,000
Common stock issued	60,340	5	60,335
Return and retirement of unvested & vested restricted stock (shares)		0
Adjustment To Additional Paid In Capital, Issuance Of Prepaid Stock Purchase Contract	88,361		88,361
Common stock redeemed (shares)		(9,000)
Common stock redeemed	(126)		(126)
Stockholders' equity at Sep. 30, 2012	262,247	25	833,994	(571,772)
Stockholders' equity (shares) at Sep. 30, 2012		24,602,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(33,868)			(33,868)
Tender Offer of Mandatory Convertible & TEU (debt to stock conversion) (shares)		566,000
Stock Issued During Period, Value, Conversion of Convertible Securities, Net of Adjustments	9,402	0	9,402	0
Amortization of nonvested stock option awards	1,986		1,986
Amortization of stock option awards	872		872
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		1,000
Stock Issued During Period, Value, Stock Options Exercised	7		7
Tax deficiency from stock transactions	(36)		(36)
Shares issued under employee stock plans, net (shares)		83,000
Shares issued under employee stock plans, net	68	0	68
Common stock issued (shares)		0
Common stock issued	(7)	0	(7)
Common stock redeemed (shares)		(6,000)
Common stock redeemed	(121)		(121)
Stockholders' equity at Sep. 30, 2013	$ 240,550	$ 25	$ 846,165	$ (605,640)
Stockholders' equity (shares) at Sep. 30, 2013		25,246,000