Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical)

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CONDENSED CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Notes payable, unamortized discount $ 357 $ 424
Preferred stock, par value (in USD per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized (in shares) 50,000,000 50,000,000
Common stock, par value (in USD per share) $ 0.0001 $ 0.0001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 200,517,787 198,583,941
Common stock, shares outstanding (in shares) 200,517,787 198,583,941
Series A Preferred Stock    
Preferred stock, par value (in USD per share) $ 0.0001 $ 0.0001
Preferred stock, shares authorized (in shares) 23,844,916 23,844,916
Preferred stock, dividend rate 8.00% 8.00%
Preferred stock, shares issued (in shares) 17,012,075 17,012,075
Preferred stock, shares outstanding (in shares) 17,012,075 17,012,075
Preferred stock, liquidation preference $ 425,302 $ 425,302