Related Party Transactions - Management Services Agreement (Details) - Sagard Capital Partners, L.P. - USD ($)		1 Months Ended		12 Months Ended
	Sep. 01, 2020	May 31, 2019	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Consulting and management advisory services fees			$ 450,000
Maximum aggregate payments for consulting and management advisory services received			$ 1,400,000
Issuance of common stock in exchange for services (in shares)	2,289,474
Accrued consulting and management fees	$ 1,100,000
Management fee incurred				$ 338,000	$ 439,000
Payable amount				$ 0	$ 788,000
Payment of fees		$ 250,000