Annual report pursuant to Section 13 and 15(d)

Investment in Unconsolidated Affiliate (Details)

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Investment in Unconsolidated Affiliate (Details)
$ / shares in Units, ¥ in Thousands, shares in Thousands, $ in Thousands
Oct. 22, 2019
USD ($)
Oct. 22, 2019
CNY (¥)
Apr. 30, 2019
CNY (¥)
Jan. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
Exoskeleton Intelligent Robotics Co. Limited          
Schedule of Equity Method Investments [Line Items]          
Right to receive ownership percentage 20.00% 20.00%      
Direct costs         $ 36
Two Other Parties | Exoskeleton Intelligent Robotics Co. Limited          
Schedule of Equity Method Investments [Line Items]          
Payment to acquire investment $ 92,000 ¥ 624,000      
Investment agreement in years 10 years 10 years      
JV Partners | Joint Venture          
Schedule of Equity Method Investments [Line Items]          
Payment to acquire investment | ¥     ¥ 62,400    
Contribution payable | ¥     124,800    
Committed contribution | ¥     ¥ 436,800    
Term of contribution     10 years    
Zhejiang Youchuang Venture Capital Investment Co., Ltd | Ekso Bionics Holdings, Inc          
Schedule of Equity Method Investments [Line Items]          
Aggregate investment       $ 10,000  
Financing receivable       $ 5,000  
Volume weighted average price, trading days       20 days  
Common Stock          
Schedule of Equity Method Investments [Line Items]          
Number of shares sold (in shares) | shares       3,067  
Amount received from sale of shares       $ 5,000  
Price per share sold (in dollars per share) | $ / shares       $ 1.63  
Issuance costs       $ 8  
Common Stock | Minimum          
Schedule of Equity Method Investments [Line Items]          
Price per share sold (in dollars per share) | $ / shares       $ 1.30  
Common Stock | Maximum          
Schedule of Equity Method Investments [Line Items]          
Price per share sold (in dollars per share) | $ / shares       $ 1.96