Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue Recognition (Details)

v3.22.1
Summary of Significant Accounting Policies - Revenue Recognition (Details)
12 Months Ended
Dec. 31, 2021
Equipment on lease  
Disaggregation of Revenue [Line Items]  
Useful life 5 years
Minimum | 3D Printers  
Disaggregation of Revenue [Line Items]  
Time acceptance test, period 3 months
Maximum | 3D Printers  
Disaggregation of Revenue [Line Items]  
Time acceptance test, period 6 months