Share-Based Compensation - Unvested RSAs Outstanding (Details) - RSAs	3 Months Ended
	Mar. 31, 2020 $ / shares shares
Number of Shares
Unvested RSAs, Beginning Balance (in shares) | shares	351,048
Granted (in shares) | shares	7,573
Vested (in shares) | shares	(3,332)
Unvested RSAs, Ending Balance (in shares) | shares	355,289
Weighted-Average Grant Date Fair Value
Unvested RSAs, Beginning Balance (in dollars per share) | $ / shares	$ 40.67
Granted (in dollars per share) | $ / shares	26.47
Vested (in dollars per share) | $ / shares	39.32
Unvested RSAs, Ending Balance (in dollars per share) | $ / shares	$ 40.38