Quarterly report pursuant to Section 13 or 15(d)

Borrowing Arrangements - Convertible promissory notes (Details)

v3.21.2
Borrowing Arrangements - Convertible promissory notes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 29, 2021
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 19, 2019
Debt Instrument [Line Items]                        
Common Stock, Shares, Outstanding   48,296,484   48,296,484   32,170,068            
Legacy Shapeways [Member] | Post Business Combination [Member]                        
Debt Instrument [Line Items]                        
Common Stock, Shares, Outstanding   1,189,558   1,189,558                
Legacy Shapeways [Member] | Unpaid And Accrued Interest [Member] | Post Business Combination [Member]                        
Debt Instrument [Line Items]                        
Common Stock, Shares, Outstanding   217,183   217,183                
Common Stock [Member]                        
Debt Instrument [Line Items]                        
Common Stock, Shares, Outstanding   48,296,484 32,132,078 48,296,484 32,132,078 32,184,263 32,302,841 32,220,158 32,063,523 31,922,253 31,921,259  
Convertible Notes Payable [Member]                        
Debt Instrument [Line Items]                        
Aggregate principal amount                       $ 5,000
Interest rate                       8.00%
Conversion price defined as percentage of next equity price per share           70.00%            
Interest expense   $ 109 $ 100 $ 309 $ 300              
Debt conversion convertible instrument amount $ 5,000                      
Debt instrument unpaid and accrued interest   $ 913   $ 913                
Convertible Notes Payable [Member] | Common Stock [Member]                        
Debt Instrument [Line Items]                        
Debt conversion converted instrument shares issued 1,434,391                      
Convertible Notes Payable [Member] | Common Stock [Member] | Unpaid And Accrued Interest [Member]                        
Debt Instrument [Line Items]                        
Debt conversion converted instrument shares issued 261,884