Share-based Compensation - Options (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) $ / shares shares
Weighted Average Exercise Price
Weighted average contractual term	8 years 11 months 4 days
Stock Options
Number of Shares
Options outstanding, beginning balance (in shares) | shares	380,180
Granted (in shares) | shares	233,888
Exercised (in shares) | shares	(13,020)
Forfeited (in shares) | shares	(2,855)
Options outstanding, ending balance (in shares) | shares	598,193
Options vested and exercisable (in shares) | shares	199,223
Weighted Average Exercise Price
Options outstanding, beginning balance (in dollars per share) | $ / shares	$ 26.01
Granted (in dollars per share) | $ / shares	20.92
Exercised (in dollars per share) | $ / shares	22.31
Forfeited (in dollars per share) | $ / shares	31.99
Options outstanding, ending balance (in dollars per share) | $ / shares	24.07
Options vested and exercisable (in dollars per share) | $ / shares	$ 24.80
Unrecognized compensation expense | $	$ 6.5
Weighted-average period for recognition of compensation cost	2 years 7 months 17 days