Quarterly report pursuant to Section 13 or 15(d)

Investments, Equity Method and Joint Ventures (Details)

v3.20.2
Investments, Equity Method and Joint Ventures (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]    
Loss on investment of unconsolidated affiliate $ 66 $ 0
Exoskeleton Intelligent Robotics Co. Limited    
Schedule of Equity Method Investments [Line Items]    
Loss on investment of unconsolidated affiliate $ 66