Stock-Based Compensation - Schedule of Stock Option Activity (Details) - Employee Stock Option	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of Options
Number of options outstanding, balance beginning (in shares) | shares	5,167,739
Number of options issued (in shares) | shares	3,049,178
Number of options exercised (in shares) | shares	0
Number of options forfeited (in shares) | shares	(66,588)
Number of options expired (in shares) | shares	(68,948)
Number of options outstanding, balance ending (in shares) | shares	8,081,381
Number of options exercisable (in shares) | shares	3,562,724
Weighted Average Exercise Price
Shares outstanding exercise price, balance beginning (in dollars per share) | $ / shares	$ 3.34
Issued, exercise price (in dollars per share) | $ / shares	0.41
Exercised, exercise price (in dollars per share) | $ / shares	0
Forfeited, exercise price (in dollars per share) | $ / shares	2.17
Expired, exercise price (in dollars per share) | $ / shares	4.81
Shares outstanding exercise price, balance ending (in dollars per share) | $ / shares	2.23
Exercisable, exercise price (in dollars per share) | $ / shares	$ 4.06