ORGANIZATION - Additional Information (Details)	Sep. 30, 2021 € / shares shares	Sep. 15, 2021 USD ($)
JV
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Shares required to purchase under joint venture | shares	17,500
Share purchase price per share | € / shares	€ 1
JV | TubeSolar AG
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Minority stake percentage	30.00%
Maximum | Long-Term Supply and Joint Development Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Non-recurring engineering fees receivable		$ 4,000,000
Milestones receivable		$ 13,500,000