Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts	$ 10	$ 10	$ 25
Preferred stock, annual dividend rate	6.25%
Preferred stock, shares authorized	40,000,000	40,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	4,927,797	4,927,797	4,692,965
Noncontrolling interest in consolidated partnership, redemption value	$ 1,367	$ 1,367	$ 25
Redeemable Preferred Stock Series B [Member]
Preferred stock, annual dividend rate	10.00%	10.00%
Redeemable preferred stock, shares authorized	800,000	800,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares outstanding	332,500	332,500
Preferred stock, liquidation preference	$ 8,312	$ 8,312
Preferred Stock Series A [Member]
Preferred stock, annual dividend rate		8.00%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares outstanding	803,270	803,270
Series C Convertible Preferred Stock [Member]
Preferred stock, annual dividend rate		6.25%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares outstanding	3,000,000	3,000,000
Preferred stock, liquidation preference	$ 30,000	$ 30,000