ORGANIZATION - Additional Information (Details)		12 Months Ended
	Jan. 28, 2022 $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2021 € / shares shares	Sep. 15, 2021 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Revenues | $		$ 607,783	$ 66,613
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]		Products	Products
Common stock, par value (in dollars per share) | $ / shares		$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)		500,000,000	500,000,000	500,000,000
Subsequent Event
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Reverse stock split	0.0002
Common stock, par value (in dollars per share) | $ / shares	$ 0.0001
JV
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Shares required to purchase under joint venture		17,500		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%		30.00%
TubeSolar
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Revenues | $		$ 40,000
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]		Products
Maximum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock shares issued and outstanding	23,740,000,000
Common stock, shares authorized (in shares)	30,000,000,000
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
Minimum
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Common stock shares issued and outstanding	4,810,000
Common stock, shares authorized (in shares)	500,000,000