Stock Compensation - Employee Stock Purchase Plan (Details) - Employee Stock - USD ($)		12 Months Ended
	May 28, 2020	Dec. 31, 2021	Dec. 31, 2020
Stock compensation
Maximum employee subscription rate	10.00%
Maximum employee subscription amount	$ 25,000
Purchase discount of employee stock	15.00%
Stock plan offering period	6 months
Stock-based compensation expense		$ 700,000	$ 500,000
Shares issued (in shares)		133,214
Shares reserved for future issuance (in shares)		691,786