Shareholders' Equity (Details) (USD $)	6 Months Ended				1 Months Ended		2 Months Ended				1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Nov. 15, 2011	Sep. 30, 2013 Common Stock [Member]	Aug. 31, 2013 Common Stock [Member]	Sep. 30, 2013 Common Stock [Member]	Aug. 30, 2013 UST [Member] Amended and Restated Warrants [Member]	Aug. 30, 2013 UST [Member] Series B Preferred Stock [Member]	Jul. 26, 2013 UST [Member] Series B Preferred Stock [Member]	Jul. 31, 2013 UST [Member] Series B Preferred Stock [Member] Amended and Restated Warrants [Member]	Aug. 30, 2013 UST [Member] Series B Preferred Stock [Member] Amended and Restated Warrants [Member]	Jul. 26, 2013 UST [Member] Series B Preferred Stock [Member] Amended and Restated Warrants [Member]	Jul. 26, 2013 UST [Member] Common Stock [Member] Amended and Restated Warrants [Member]
Class of Stock [Line Items]
Amount agreed under securities purchase agreement											$ 81,000,000
Series B Preferred Stock issued (in shares)	0		0										74,426
Liquidation preference (in dollars per share)										$ 1,000
Warrants issued to purchase common stock (in shares)														346,154
Warrants exercise price (in dollars per share)														$ 7.234
Book balance								1,500,000	87,200,000
Discount								100,000	7,600,000			7,700,000
Shares issued during period (in shares)					1,725,000	11,500,000
Shares issued value during period	37,000	1,966,000			13,400,000	89,100,000
Net proceeds from the issuance of common stock	$ 37,000	$ 957,000					$ 97,100,000
Shareholders with certain limited exceptions (in hundredths)				5.00%
Number of Series C Junior Participating Preferred Stock purchase by each right (in shares)	1/1000
Discount to current market price of the common stock (in hundredths)				50.00%
Beneficial ownership level (in hundredths)				4.99%