Net Loss Per Share - Antidilutive Securities (Details) - shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Options to purchase units outstanding
Net Loss Per Share
Antidilutive securities excluded from computation of weighted average units outstanding (in shares)	641,534	743,025
Restricted Stock
Net Loss Per Share
Antidilutive securities excluded from computation of weighted average units outstanding (in shares)		6,666
Warrant
Net Loss Per Share
Antidilutive securities excluded from computation of weighted average units outstanding (in shares)	2,028,626	2,028,626