Revenue Recognition - Performance Obligation (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 5,479
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,568
Expected timing of satisfaction, period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,455
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 613
Expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,843
Expected timing of satisfaction, period
Product revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,977
Product revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 0
Expected timing of satisfaction, period	6 months
Product revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 67
Expected timing of satisfaction, period	1 year
Product revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 67
Expected timing of satisfaction, period	1 year
Product revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,843
Expected timing of satisfaction, period
Research and development revenue
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 3,502
Research and development revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,568
Expected timing of satisfaction, period	6 months
Research and development revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 1,388
Expected timing of satisfaction, period	1 year
Research and development revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 546
Expected timing of satisfaction, period	1 year
Research and development revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Performance obligation	$ 0
Expected timing of satisfaction, period