Equity and Mezzanine Equity - Additional Information (Details)		1 Months Ended	12 Months Ended
	Jan. 01, 2019	Jan. 31, 2018 shares	Dec. 31, 2019 USD ($) director quarter holder $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Apr. 29, 2019 shares	Mar. 31, 2018 $ / shares	Jun. 15, 2016 shares	Jun. 04, 2015 shares	Apr. 29, 2014 $ / shares shares
Equity [Line Items]
Authority to issue stock (in shares)			33,750,000
Shares of common stock authorized (in shares)			18,750,000	18,750,000
Common stock, par value (in dollars per share) | $ / shares			$ 0.01	$ 0.01
Ownership interest of operating partnership			98.34%
Units to stock conversion ratio			1
Common units outstanding (in shares)			14,105,712	14,105,712
Preferred Stock, Redemption Price Per Share | $ / shares			$ 25.00
Private placement transaction, common stock shares under warrants issued					248,325
Trust Owning [Member]
Equity [Line Items]
Common units outstanding (in shares)			13,871,693	13,870,680
Maximum | Exchange of Stock for Stock [Member]
Equity [Line Items]
Shares of common stock authorized (in shares)			18,750,000
Preferred stock, shares authorized (in shares)			15,000,000
Common Stock
Equity [Line Items]
Issuance of common stock under Share Incentive Plan (in shares)			181,807	206,358
Series D Cumulative Convertible Preferred Stock
Equity [Line Items]
Preferred stock, shares authorized (in shares)			4,000,000
Preferred stock shares redeemed (in shares)			3,600,636	3,600,636
Series A Preferred Stock
Equity [Line Items]
Preferred stock, shares authorized (in shares)			4,500	4,500
Preferred stock, Shares Issued (in shares)			562	562
Preferred stock outstanding (in shares)			562	562
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares			$ 1,000	$ 1,000
Preferred Stock, Liquidation Preference Value | $			$ 562,000	$ 562,000
Preferred stock cumulative dividend rate per annum			9.00%
Preferred stock shares redeemed (in shares)			562
Percentage of price at which common stock is sold in secondary offering			103.00%
Series B Preferred Stock
Equity [Line Items]
Common stock, par value (in dollars per share) | $ / shares			$ 0.01
Preferred stock, shares authorized (in shares)			5,000,000	5,000,000
Preferred stock, Shares Issued (in shares)			1,875,748	1,875,748
Preferred stock outstanding (in shares)			1,875,748	1,875,748
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares			$ 25.00	$ 25.00
Preferred Stock, Liquidation Preference Value | $			$ 46,900,000.00	$ 46,900,000.00
Preferred stock cumulative dividend rate per annum			9.00%
Convertible Preferred Stock, Terms of Conversion			20 days
Adjusted conversion price of preferred to common (in usd per share) | $ / shares			$ 58
Preferred Stock, Redemption Price Per Share | $ / shares			$ 40.00
Private placement transaction, common stock shares under warrants issued									1,986,600
Series D Preferred Stock
Equity [Line Items]
Preferred stock, shares authorized (in shares)			4,000,000	4,000,000
Preferred stock, Shares Issued (in shares)			3,600,636	3,600,636
Preferred stock outstanding (in shares)			3,600,636	3,600,636
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares			$ 25.00	$ 25.00
Preferred Stock, Liquidation Preference Value | $			$ 101,660,000.00	$ 91,980,000.00
Preferred stock cumulative dividend rate per annum	10.75%
Preferred Stock, Redemption Price Per Share | $ / shares			$ 25
Proceeds from issuance of Series B convertible preferred stock | $				$ 21,160,000
Preferred Stock, Initial Liquidation Preference Per Share | $ / shares			$ 2.1875
Preferred Stock, Dividend Over Initial Rate, Percentage			2.00%
Secondary offering common stock price per share (in usd per share) | $ / shares			$ 16.96
Ratio of Asset Coverage to Total Debt			200.00%
Preferred Stock, Period To Pay Dividends After Payment Date			3 days
Preferred Stock, Liquidation Preference Per Share Per Annum | $ / shares			$ 0.50
Preferred Stock, Minimum Consecutive Quarterly Periods for Dividends in Arrears | quarter			6
Preferred Stock, Increase in Number or Holders of Shares | holder			2
Preferred Stock, Percentage of Holders of Shares Outstanding			20.00%
Number of Additional Directors | director			2
Series D Preferred Stock | Public Offering [Member]
Equity [Line Items]
Sale of Stock, Number of Shares Issued in Transaction		1,363,636
Sale of Stock, Price Per Share | $ / shares						$ 16.50
Series D Preferred Stock | Minimum
Equity [Line Items]
Preferred stock cumulative dividend rate per annum			8.75%
Series D Preferred Stock | Maximum
Equity [Line Items]
Preferred stock cumulative dividend rate per annum			14.00%
Common Stock
Equity [Line Items]
Private placement transaction, common stock shares under warrants issued									1,986,600
Private placement transaction, exercise price of warrants (in usd per share) | $ / shares									$ 44
Warrants issued									0.125
Common Stock | 2015 Incentive Plan
Equity [Line Items]
Number of shares authorized under Share Incentive Plan								125,000
Shares available for issuance under the Company’s Share Incentive Plan (in shares)			41,104
Issuance of common stock under Share Incentive Plan (in shares)			0	0
Common Stock | 2016 Incentive Plan
Equity [Line Items]
Number of shares authorized under Share Incentive Plan							625,000
Shares available for issuance under the Company’s Share Incentive Plan (in shares)			132,707
Issuance of common stock under Share Incentive Plan (in shares)			181,807,000	206,358,000