Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.6.0.2
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2016
Dec. 31, 2015
Senior common stock, par value (in dollars per share) $ 0.001 $ 0.001
Senior common stock, shares authorized (in shares) 4,450,000 7,500,000
Senior common stock, shares issued (in shares) 959,552 972,214
Senior common stock, shares outstanding (in shares) 959,552 972,214
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 34,040,000 38,500,000
Common stock, shares issued (in shares) 24,882,758 22,485,607
Common stock, shares outstanding (in shares) 24,882,758 22,485,607
Series D Preferred Stock [Member]    
Redeemable preferred stock, par value (in dollars per share) $ 0.001 $ 0
Redeemable preferred stock, liquidation preference (in dollars per share) $ 25 $ 0
Redeemable preferred stock, shares authorized (in shares) 6,000,000 0
Redeemable preferred stock, shares issued (in shares) 2,917,458 0
Redeemable preferred stock, shares outstanding (in shares) 2,917,458 0
Series A and B Preferred Stock [Member]    
Redeemable preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Redeemable preferred stock, liquidation preference (in dollars per share) $ 25 $ 25
Redeemable preferred stock, shares authorized (in shares) 5,350,000 2,300,000
Redeemable preferred stock, shares issued (in shares) 2,264,000 2,150,000
Redeemable preferred stock, shares outstanding (in shares) 2,264,000 2,150,000
Mandatorily Redeemable Preferred Stock [Member] | Series C Preferred Stock [Member]    
Redeemable preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Redeemable preferred stock, liquidation preference (in dollars per share) $ 25 $ 25
Redeemable preferred stock, shares authorized (in shares) 160,000 1,700,000
Redeemable preferred stock, shares issued (in shares) 0 1,540,000
Redeemable preferred stock, shares outstanding (in shares) 0 1,540,000