| Schedule of Disaggregation of Revenue by Geography | The following revenue disaggregated by geography was recognized:
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   |    | Three Months EndedSeptember 30, 2021
 |   |   | Nine Months EndedSeptember 30, 2021
 |   |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | $ | 3,514 |  |  |  | 37 | % |  | $ | 13,426 |  |  |  | 47 | % |  
|  |  |  | 4,805 |  |  |  | 50 | % |  |  | 10,561 |  |  |  | 37 | % |  
|  |  |  | 1,242 |  |  |  | 13 | % |  |  | 4,403 |  |  |  | 16 | % |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | $ | 9,561 |  |  |  | 100 | % |  | $ | 28,390 |  |  |  | 100 | % |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | Three Months EndedSeptember 30, 2020
 |  |  | Nine Months EndedSeptember 30, 2020
 |  |  
|  |  | $ | 2,909 |  |  |  | 41 | % |  | $ | 10,149 |  |  |  | 48 | % |  
|  |  |  | 2,823 |  |  |  | 39 | % |  |  | 8,038 |  |  |  | 38 | % |  
|  |  |  | 1,452 |  |  |  | 20 | % |  |  | 3,034 |  |  |  | 14 | % |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | $ | 7,184 |  |  |  | 100 | % |  | $ | 21,221 |  |  |  | 100 | % |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|  |  | The Netherlands represented 18% and 26% for the three and nine months ended September 30, 2021, respectively, and 25% and 36% for the three and nine months ended September 30, 2020, respectively.  |  
|  |  | U.S. represented 50% and 37% for the three and nine months ended September 30, 2021, respectively, and 39% and 38% for the three and nine months ended September 30, 2020, respectively.  |  
|  |  | Australia represented 11% for the nine months ended September 30, 2021, and 17% and 10% for the three and nine months ended September 30, 2020, respectively.  |  | 
| Schedule of Changes in Contract Liabilities | Changes in Contract liabilities for the nine months ended September 30, 2021 and 2020 were as follows: 
|  |  |  |  |  |  |  |  |  |  
|   |    |  |   |    |  |   |  
| Balance at the beginning of the year |    | $ | 8,110 |   |    | $ | 4,550 |   |  
| Contract liabilities recorded during the period |    |   | 9,037 |   |    |   | 4,645 |   |  
| Revenue recognized during the period |    |   | (6,624 | )  |    |   | (1,208 | )  |  
|  |    |   | (192 | )  |    |   | —   |   |  
|  |    |  |  |   |    |  |  |   |  
| Balance at the end of the period |    | $ | 10,331 |   |    | $ | 7,987 |   |  
|  |    |  |  |   |    |  |  |   |  |