Stockholders' Equity RS Award Activity (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	12,500	107,500	320,000
Vested	(111,080)	(192,973)	(165,628)
Unvested shares forfeited	0	(32,901)	(130,258)
Share outstanding	159,246	257,826	376,200	352,086
Two Thousand Six [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	384,850
Weighted Average Fair Value at Date of Grant	$ 24.78
Vested	258,347
Unvested shares forfeited	126,503
Recognized compensation expense	$ 6,402,000
Two Thousand Six [Member] | Two Thousand Six 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	25,000
Weighted Average Fair Value at Date of Grant	$ 17.36
Vested	25,000
Unvested shares forfeited	0
Recognized compensation expense	434,000
Two Thousand Seven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	20,000
Weighted Average Fair Value at Date of Grant	$ 25.08
Vested	20,000
Unvested shares forfeited	0
Recognized compensation expense	502,000
Two Thousand Seven [Member] | Two Thousand Seven 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	4,000
Weighted Average Fair Value at Date of Grant	$ 26.48
Vested	4,000
Unvested shares forfeited	0
Recognized compensation expense	106,000
Two Thousand Eight [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	101,650
Weighted Average Fair Value at Date of Grant	$ 19.17
Vested	85,750
Unvested shares forfeited	15,900
Recognized compensation expense	1,779,000
Two Thousand Nine [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	185,100
Weighted Average Fair Value at Date of Grant	$ 8.71
Vested	146,400
Unvested shares forfeited	38,700
Recognized compensation expense	1,344,000
Two Thousand Ten [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	225,486
Weighted Average Fair Value at Date of Grant	$ 3.64
Vested	147,456
Unvested shares forfeited	78,030
Recognized compensation expense	495,000
Two Thousand Eleven [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	320,000
Weighted Average Fair Value at Date of Grant	$ 3.39
Vested	171,715
Unvested shares forfeited	73,205
Recognized compensation expense	669,000
Two Thousand Twelve [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	107,500
Weighted Average Fair Value at Date of Grant	$ 2.07
Vested	35,834
Unvested shares forfeited	0
Recognized compensation expense	124,000
Two Thousand Thirteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted	12,500
Weighted Average Fair Value at Date of Grant	$ 5
Vested	0
Unvested shares forfeited	0
Recognized compensation expense	$ 19,000