Loss Per Share - Narrative (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Number of common stock warrant and common stock options exercised (in shares)	24,877	540,000	1,720,649
Number of common stock issued for stock warrant and stock options exercised (in shares)	19,232	353,677	1,447,792
Shares surrendered in lieu of cash payment (in shares)	5,645	186,323	272,857
Equity securities
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential common shares excluded from diluted net loss per share calculation (in shares)	67,765,380	16,568,520	6,255,624