Quarterly report pursuant to Section 13 or 15(d)

ORGANIZATION, NATURE OF BUSINESS, AND RISK AND UNCERTAINTIES (Details)

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ORGANIZATION, NATURE OF BUSINESS, AND RISK AND UNCERTAINTIES (Details)
$ / shares in Units, $ in Millions
9 Months Ended
Nov. 12, 2021
USD ($)
$ / shares
shares
Dec. 09, 2020
$ / shares
shares
Sep. 30, 2021
$ / shares
Dec. 31, 2020
$ / shares
Common stock par value (in dollars per share) | $ / shares   $ 0.0001 $ 0.0001 $ 0.0001
Number of months cash and Investments sufficient to fund operating and capital expenditure     12 months  
Trine        
Exchange ratio   1.22122    
Common stock issued for acquisition | shares   161,487,334    
ExOne Company        
Aggregate purchase price | $ $ 601.2      
Paid in cash | $ $ 191.4      
Common stock issued for acquisition | shares 48,218,063      
Fair value of stock | $ $ 409.8      
Number of incentive stock options granted | shares 86,020      
Weighted average exercise price of incentive stock options | $ / shares $ 4.47