Equity Incentive Plan (Details) - $ / shares	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted common shares reserved for issuance under equity incentive plan (in shares)	3,242,306
Maximum number of shares that an individual may be granted as a proportion of outstanding common stock	9.80%
Number of restricted common shares granted during period under equity incentive plan (in shares)	367,489	277,107
Weighted average grant date fair value of restricted common shares granted during period under equity incentive plan (in usd per share)	$ 15.92	$ 19.31
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted common shares granted during period under equity incentive plan (in shares)	69,720	18,189
Weighted average grant date fair value of restricted common shares granted during period under equity incentive plan (in usd per share)	$ 5.02	$ 19.24
Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted common shares granted during period under equity incentive plan (in shares)	297,769	258,918
Weighted average grant date fair value of restricted common shares granted during period under equity incentive plan (in usd per share)	$ 18.47	$ 19.31
Award vesting period of restricted common shares granted during period under equity incentive plan	3 years