Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.22.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
item
Dec. 31, 2020
USD ($)
item
Feb. 17, 2021
USD ($)
Jan. 01, 2021
USD ($)
Significant Accounting Policies [Line Items]        
Term of annual contract 1 year      
Time period within substantially all outstanding performance obligations are recognized false      
Number of clients representing 10% or more of the company's total revenue | item 0 0    
Number of customers represents more than 10% of total accounts receivable | item   0    
Number of customers represents 28% of accounts receivable | item 1      
Grants in research and development $ 1.0      
Deferred revenue 22.7 $ 3.0    
Cumulative Effect, Period of Adoption, Adjustment | ASU 2021-08 | Acquisition of EnvisionTEC        
Significant Accounting Policies [Line Items]        
Deferred revenue     $ 0.2 $ 0.2
Cumulative Effect, Period of Adoption, Adjustment | ASU 2021-08 | ExOne Company        
Significant Accounting Policies [Line Items]        
Deferred revenue       $ 12.5
Letter of Credit        
Significant Accounting Policies [Line Items]        
Total outstanding financial guarantees and letters of credit $ 2.7      
Minimum        
Significant Accounting Policies [Line Items]        
Lease term (in years) 1 year      
Customer support and maintenance service term (in years) 1 year      
Maximum        
Significant Accounting Policies [Line Items]        
Lease term (in years) 5 years      
Customer support and maintenance service term (in years) 5 years      
Accounts receivables | Customer concentration risk | Customer One        
Significant Accounting Policies [Line Items]        
Concentrations of credit risk 24.00%