Preferred Stock (Details) (USD $)	12 Months Ended		0 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jun. 12, 2013 director	Dec. 31, 2014	Dec. 31, 2013
Preferred stock
Preferred stock, shares authorized (In shares)				10,000,000
Preferred Stocks, Par or Stated Value Per Share				$ 0.001
Convertible Preferred Stock, Conversion Ratio			2.84
Redeemable Series A-1 preferred accretion	$ (3,549,000)	$ (3,373,000)
Preferred Stock, Accretion of Redemption Discount	3,549,000	3,373,000
Additional Paid-in Capital [Member]
Preferred stock
Redeemable Series A-1 preferred accretion	(3,549,000)	(3,373,000)
Preferred Stock [Member]
Preferred stock
Preferred stock, shares authorized				10,000,000	10,000,000
Preferred stock, par value				$ 0.001	$ 0.001
Preferred stock, shares issued				0	0
Preferred stock, shares outstanding				0	0
Redeemable Preferred Stock, Series A-1 [Member]
Preferred stock
Redeemable preferred stock, shares authorized		1,441,000		0	0
Temporary Equity, Par or Stated Value Per Share		$ 0.001		$ 0.001	$ 0.001
Redeemable preferred stock, shares issued		1,015,000		0	0
Redeemable preferred stock, shares outstanding				0	0
Preferred stock, dividend percentage			6.00%
Preferred stock, issue price per share (In dollars per share)			$ 9.94
Preferred stock, cumulative unpaid dividends		3,026,000
Preferred stock, liquidation preference (In dollars per share)		$ 9.94
Number of board of directors that preference share holders entitled to present on board			1
Value of redeemable Series A-1 preferred stock		43,135,000
Amount that is multiplied by 2.84 to derive carrying value of redeemable preferred stock		7.00
Amount that is used as multiple to derive carrying value of redeemable preferred stock		2.84
Series A-2 Preferred Stock [Member]
Preferred stock
Preferred stock, shares authorized		1,058,000		0	0
Preferred stock, par value				$ 0.001	$ 0.001
Preferred stock, shares issued		805,000		0	0
Preferred stock, shares outstanding				0	0
Preferred stock, dividend percentage			6.00%
Preferred stock, cumulative unpaid dividends			$ 7,161,000
Dividends Payable, Amount Per Share		$ 0
IPO [Member] | Redeemable Preferred Stock, Series A-1 [Member]
Preferred stock
Convertible Preferred Stock, Conversion Ratio			0.3521126761
IPO [Member] | Convertible A-1 and A-2 Preferred Stock [Member]
Preferred stock
Shares converted into stock			5,336,000
Shares issued for preferred stock dividends			412,000