Fair Value Measurement - Carrying Value and Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Carrying Value | Notes receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 3,619	$ 3,650
Carrying Value | Note payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	18,862	18,695
Carrying Value | Equipment financing facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	5,982	6,371
Carrying Value | 2021 Convertible Note without embedded derivative liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	72,419	71,789
Fair Value | Fair Value, Inputs, Level 3 | Notes receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	2,519	2,805
Fair Value | Fair Value, Inputs, Level 3 | Note payable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	14,973	14,607
Fair Value | Fair Value, Inputs, Level 3 | Equipment financing facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	5,500	5,951
Fair Value | Fair Value, Inputs, Level 3 | 2021 Convertible Note without embedded derivative liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt instrument	$ 61,036	$ 61,866