Stock-Based Compensation - Restricted Stock Units (Details) - Unvested restricted stock units - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of Units
Unvested units outstanding, beginning balance (in units)	253,308	705,415
Granted (in units)		179,558
Vested (in units)	(118,603)	(540,711)
Forfeited (in units)	(15,000)	(90,954)
Unvested units outstanding, ending balance (in units)	119,705	253,308
Weighted-Average Grant-Date Fair Value
Unvested phantom units outstanding, beginning balance (in dollars per unit)	$ 1.64	$ 2.68
Granted (in dollars per unit)		1.81
Vested (in dollars per unit)	1.52	3.10
Forfeited (in dollars per unit)	1.23	1.41
Unvested phantom units outstanding, ending balance (in dollars per unit)	$ 1.81	$ 1.64