Stockholders' Equity - Reconciliation of Common Stock (Details) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance, beginning of period (in shares)	21,410,578	18,634,502
Issuance of common stock (in shares)	1,726,384	2,554,247
Restricted stock-based awards (in shares)	270,536	221,829
Balance, end of period (in shares)	23,407,498	21,410,578