Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts	$ 8	$ 25
Preferred stock, annual dividend rate	6.25%
Preferred stock, shares authorized	40,000,000
Common stock, par value	$ 0.01
Common stock, shares authorized	200,000,000
Common stock, shares outstanding	4,923,847	4,692,965
Noncontrolling interest in consolidated partnership, redemption value	1,139	25
Redeemable Preferred Stock Series B [Member]
Preferred stock, annual dividend rate	10.00%
Redeemable preferred stock, shares authorized	800,000
Preferred stock, par value	$ 0.01
Preferred stock, shares outstanding	332,500
Preferred stock, liquidation preference	8,312
Preferred Stock Series A [Member]
Preferred stock, annual dividend rate	8.00%
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	2,500,000
Preferred stock, shares outstanding	803,270
Series C Convertible Preferred Stock [Member]
Preferred stock, annual dividend rate	6.25%
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	3,000,000
Preferred stock, shares outstanding	3,000,000
Preferred stock, liquidation preference	$ 30,000