Stock-Based Compensation - Options (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 18, 2018	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrecognized compensation expense
Total compensation expense		$ 1.2
2013 Plan and 2018 Plan | Selling, general and administrative expense
Unrecognized compensation expense
Total compensation expense		$ 2.7	$ 2.8	$ 7.8
Stock options
Outstanding
Exercised (in shares)		569,880
Stock options | 2013 Plan and 2018 Plan
Unrecognized compensation expense
Unrecognized compensation expense		$ 1.4
Stock options | 2018 Plan
Stock-based compensation
Minimum fair market value per share of underlying stock used to determine option grant price, as a percent	100.00%
Expiration of stock options	10 years
Outstanding
Outstanding Balance at beginning of the year (in shares)		1,635,700
Forfeited (in shares)		(190,401)
Outstanding Balance at the end of the year (in shares)		1,445,299	1,635,700
Weighted average Grant Date fair Value
Outstanding balance at the beginning of the period		$ 5.67
Forfeited		(5.97)
Outstanding balance at the end of the period		5.63	$ 5.67
Weighted Average Exercise Price
Outstanding Balance at the beginning of the year		11.89
Outstanding Balance at the end of the year (in shares)		$ 11.78	$ 11.89
Additional information
Average Remaining Vesting Period		8 months 8 days	1 year 5 months 1 day
Aggregate Intrinsic Value		$ 0.0
Stock options | 2018 Plan | Minimum
Stock-based compensation
Vesting period		2 years
Stock options | 2018 Plan | Maximum
Stock-based compensation
Vesting period		4 years