Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.8.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Series A cumulative term preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Series A cumulative term preferred stock, liquidation preference (in dollars per share) $ 25 $ 25
Series A cumulative term preferred stock, shares authorized (in shares) 2,000,000 2,000,000
Series A cumulative term preferred stock, shares issued (in shares) 1,150,000 1,150,000
Series A cumulative term preferred stock, shares outstanding (in shares) 1,150,000 1,150,000
Series B preferred stock par value (in dollars per share) $ 0.001 $ 0
Series B preferred stock, shares authorized (in shares) 6,500,000 0
Series B preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 91,500,000 98,000,000
Common stock, shares issued (in shares)   13,791,574
Common stock, shares outstanding (in shares) 15,216,199 13,791,574