Accounts Receivable and Revenue Concentration - Narrative (Details) - USD ($)		3 Months Ended		9 Months Ended
	Feb. 26, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Bad debt expense		$ 0	$ 0	$ 0	$ 0
Workforce reduction | Customer B
Restructuring Cost and Reserve [Line Items]
Positions eliminated	35.00%
Workforce reduction | One-time termination benefits | Customer B
Restructuring Cost and Reserve [Line Items]
Total estimated one-time costs of termination benefits	$ 1,300,000
Termination benefits paid				1,200,000
Workforce reduction | One-time termination benefits | Other accrued liabilities | Customer B
Restructuring Cost and Reserve [Line Items]
Termination related costs accrued		100,000		100,000
Workforce reduction | One-time termination benefits | General and administrative expense | Customer B
Restructuring Cost and Reserve [Line Items]
Termination related costs incurred		$ 50,000.00		$ 1,300,000