Equity Transactions and Instruments (Details Textual) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended			0 Months Ended		6 Months Ended			6 Months Ended		6 Months Ended	12 Months Ended	1 Months Ended	6 Months Ended	12 Months Ended	0 Months Ended	1 Months Ended		3 Months Ended	12 Months Ended
	Feb. 14, 2013	May 31, 2014	Dec. 31, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Common Stock [Member]	May 14, 2014 Public Offering [Member] Common Stock [Member]	May 14, 2014 Underwriter [Member] Common Stock [Member]	Jun. 30, 2014 Series A Preferred Stock [Member]	Dec. 31, 2013 Series A Preferred Stock [Member]	Jun. 30, 2014 Series A Cumulative Convertible Perpetual Preferred Stock [Member]	Jun. 30, 2014 Series B Preferred Stock [Member]	Dec. 31, 2013 Series B Preferred Stock [Member]	Jun. 30, 2014 7.00 Warrants [Member]	Dec. 31, 2008 7.00 Warrants [Member]	Sep. 29, 2009 11.50 Warrants [Member]	Jun. 30, 2014 11.50 Warrants [Member]	Dec. 31, 2009 11.50 Warrants [Member]	May 14, 2014 Private Offering [Member] Underwriter [Member]	May 31, 2014 Private Offering [Member] Series B Preferred Stock [Member]	May 14, 2014 Private Offering [Member] Series B Preferred Stock [Member]	Dec. 31, 2012 Private Offering [Member] Convertible Preferred Stock [Member]	Dec. 31, 2012 Private Offering [Member] Convertible Preferred Stock [Member]	Jun. 30, 2014 Private Offering [Member] Convertible Preferred Stock [Member]
Class of Stock [Line Items]
Stock Issued During Period Units Of Initial Public Offering															40,000,000
Price Per Unit Of Initial Public Offering															$ 10.00
Price Per Share Of Common Stock														$ 7.00				$ 11.50
Price Per Share Of Warrants															$ 7.00			$ 11.50
Shares Of Warrants Outstanding	655,499
Unexercised Warrants Price Per Share	$ 7.00
Redemption Price Per Warrant																	$ 0.01
Investment Warrant Expiration Year																	February 2015
Number Of Warrants Exchange For New Warrants																14,400,000
Common Stock Redemption Price Description																	closing price of the common stock is at least $18.00 per share for any 20 trading days within a 30-trading-day period
Class of Warrant or Right, Outstanding																	277,021
Class Of Warrant Exercise Price Of Warrants																	$ 11.50
Preferred stock, shares issued									1,000,000	1,000,000		500,000	0							500,000		1,000,000	1,000,000
Convertible Perpetual Preferred Discount On Issue Of Shares Including Offering Costs																				$ 4,300,000		$ 3,500,000	$ 3,500,000
Net Proceeds From Issuance Of Convertible Preferred Stock				120,753,000	0															120,800,000			96,500,000
Preferred Stock, Liquidation Preference Per Share											$ 100													$ 250
Preferred Stock Conversion Rate				10.6022								33.456
Preferred Stock Convertible Conversion Price				$ 9.43								$ 7.47
Dividends Payable, Current									300,000			1,100,000
Preferred Stock, Par Or Stated Value Per Share				$ 0.0001					$ 0.0001	$ 0.0001		$ 0.0001	$ 0.0001
Preferred Stock Shares Authorized Undesignated And Unissued				500,000
Annual Cash Dividend Amount									3,500,000	7,000,000
Preferred Stock, Dividend Rate, Percentage																				6.75%		7.00%
Preferred Stock, Discount on Shares																			2,600,000
Preferred Stock Purchase Price Per Share																				$ 242.50
Convertible Preferred Stock, Terms of Conversion												On or prior to May 15, 2019, in the event of a fundamental change, holders of the Series B Preferred Stock will have the right to convert some or all of their shares of Series B Preferred Stock into the greater of (i) a number of shares of the Companys common stock as subject to adjustmentplus the make-whole premium, if any, and (ii) a number of shares of the Companys common stock equal to the lesser of (a) the liquidation preference divided by the market value of the Companys common stock on the effective date of such fundamental change and (b) 81.9672 (subject to adjustment). In certain circumstances, the Company may elect to cash settle any conversions in connection with a fundamental change
Stock Issued During Period, Shares, New Issues			1,000,000	7,692,308			8,483,608	1,106,558
Common Stock Purchase Price Per Share				$ 6.50															$ 6.10
Private Placement				50,000,000
Stock Purchase Agreement Commencing Start Date						May 03, 2014
Stock Purchase Agreement Commencing End Date						Jul. 31, 2014
Stock Purchase Agreement Description												the protection period, we issue or sell either (i)convertible securities with an exercise or conversion price lower than $7.9625, or (ii)common stock at an issue price lower than $6.50, in either case other than options or other securities issued under our 2009 Stock Incentive Plan or our 2012 Equity Incentive Plan, then we are obligated to deliver, within ten calendar days of the end of the protection period, to each purchaser in the direct offering in the same proportion as the number of shares purchased by such purchaser in the direct offering, additional shares determined in accordance with the formula set forth in the stock purchase agreement, or protection shares; provided, however, that the number of protection shares to be delivered: (x)collectively to the purchasers under the stock purchase agreement shall not, when aggregated with the number of shares purchased in the direct offering, be greater than 9.99% of all issued and outstanding shares of common stock at the time of delivery of the protection shares, and (y)shall not, in the aggregate, exceed the limit at which the approval of our stockholders would be required under rules of The Nasdaq Global Select Market
Proceeds from Issuance or Sale of Equity, Total																			49,000,000
Other Underwriting Expense																			200,000
Convertible Perpetual Preferred Discount Per Share on Issue of Shares																					$ 7.50
Preferred Stock, Dividend Rate, Per-Dollar-Amount									$ 7.00			$ 16.875
Proceeds from Issuance of Common Stock		49,900,000		98,897,000	0
Payments of Stock Issuance Costs		$ 100,000																		$ 400,000
Preferred Stock, Shares Authorized				2,000,000					1,000,000	1,000,000		500,000	0
Price Per Share Of Preferred Stock																				$ 250