Stockholders' Equity (Details Textual) (USD $)	2 Months Ended	4 Months Ended	6 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended
	Aug. 31, 2011	May 31, 2011	Jun. 30, 2011	Mar. 31, 2011	Jun. 30, 2011 Employee Stock [Member]	Mar. 31, 2011 General and Administrative Expense [Member] Employees Stock Purchase Plan [Member]	Jun. 30, 2011 Restricted Stock [Member]	Aug. 02, 2011 Dividend Declared [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan					Purchase up to $25,000 of Common Stock at the lesser of 85% of the market price on the date of grant or 85% of the market price on the date of exercise of such option and plan expire if not exercised 27 months after each such option’s date of grant
Additional Stockholders Equity (Textuals) [Abstract]
Amount of employee stock purchase plan expenses recorded in general and administrative expenses						$ 200,000
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock excluded from the calculation of diluted loss per common share					81,935		1,034,520
Subsequent Event [Line Items]
Subsequent event per share								$ 0.30
Stockholders Equity (Textuals) [Abstract]
Sold Shares of common stock under equity offering program	1,360,900		10,287,800
Stock authorized during period under equity offering program	2,791,300
Proceeds from issuance of common stock under at-the-market equity offering program	27,700,000		223,900,000
Minimum price of common stock under equity offering program			$ 20.27
Maximum price of common stock under equity offering program			$ 23.63
Common stock optioned to purchase not exercised expired				166,207
Market value of restricted stock grant to each non employee director		$ 76,000