Annual report pursuant to Section 13 and 15(d)

Operating Segments - Additional Information (Details)

v3.21.1
Operating Segments - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
segment
Vechicle
Dec. 31, 2019
segment
Vechicle
Segment Reporting Information [Line Items]    
Number of operating segments 2 3
Number of corporate non-operating segments 1 1
Forty-Vehicle Ferry    
Segment Reporting Information [Line Items]    
Number of vehicle ferry projects | Vechicle 2 2