Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	23,008,615	22,739,207
Common stock, shares outstanding (in shares)	23,008,615	22,739,207
Series C Cumulative Preferred Stock
Cumulative redeemable preferred stock, shares issued (in shares)	42,000	42,000
Cumulative redeemable preferred stock, shares outstanding (in shares)	42,000	42,000
Series D Cumulative Redeemable Preferred Stock
Cumulative redeemable preferred stock, shares issued (in shares)	30,000	30,000
Cumulative redeemable preferred stock, shares outstanding (in shares)	30,000	30,000