Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (shares)	34,435,907	34,403,250
Common stock, shares outstanding (shares)	34,435,907	34,403,250
Series B
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, per share liquidation value (usd per share)	$ 29	$ 29
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (shares)	44,258	44,258
Preferred stock, shares outstanding (in shares)	44,258	44,258
Series F
Preferred stock, per share liquidation value (usd per share)	$ 100,000	$ 100,000
Preferred stock, shares issued (shares)	965	120
Preferred stock, shares outstanding (in shares)	965	120
Preferred stock, per share redemption	$ 100,000	$ 100,000