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Significant Accounting Policies (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
May 01, 2018
Apr. 01, 2019
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Feb. 28, 2021
Jan. 31, 2021
Jan. 31, 2019
Significant Accounting Policies (Details) [Line Items]                            
Total shareholders’ deficits                 $ (384,602,000)          
Working capital total                 5,697,000          
Cash flows operations             $ (15,025,000) $ 260,000 $ 15,556,000 $ 13,371,000 $ (5,492,000)      
Ownership percentage                 80.00% 20.00%        
Net revenues                     509,000      
Net income loss                     5,492,000      
Variable interest entity operating activities amount                     6,796,000      
Variable interest entity investing activities                     1,290,000      
Notes receivable                 $ 20,839,000 $ 33,356,000        
Interest income from the short-term investments                 $ 37,000 366,000        
Estimated useful life term                 50 years          
Recognized impairment loss of long lived assets                 $ 567,000 $ 2,908,000        
Fair value measurement percentage                   20.00%        
Deferred revenue                           $ 1,565,000
Adjustment to retained earnings and accumulate deficit                 1,565,000         $ 1,565,000
Revenue     $ 33,372,000   $ 21,698,000   48,310,000 28,647,000 107,518,000 $ 76,434,000 174,235,000      
Revenue recognized                 582,000 556,000        
Amortized deferred subsidy                 166,000 2,304,000 1,904,000      
Deferred subsidy income                 215,000 127,000        
Deferred non current portion                 1,221,000 1,389,000        
Government subsidy income                 3,000,000 3,243,000 $ 9,538,000      
Aggregate amount                 35,194,000 $ 32,844,000        
Net revenue percentage                 $ 0.10          
Percentage of accounts receivable                     10.00%      
Purchase percentage                 12.00% 17.00% 26.00%      
Revenue recognized     135,000   206,000   $ 1,321,000 $ 446,000            
Subsequent Event [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Issuance of convertible notes                       $ 9,921,000 $ 57,500,000  
Revenue From Products [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Value added tax rate percentage   13.00%                        
Services [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Value added tax rate percentage   6.00%                        
Customers [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Group to pledge notes received percentage                 111.00%          
Deposit [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Deposit of the face rate                 100.00%          
Minimum [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Value added tax rate percentage 17.00%                          
Maximum [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Value added tax rate percentage 16.00%                          
Asia&Pacific [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Revenue     29,084,000 $ 41,568,000 14,802,000 $ 18,687,000     $ 82,655,000 $ 65,437,000        
Europe [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Revenue     4,231,000 6,558,000 6,890,000 9,930,000     24,314,000 10,679,000        
Other Geographical [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Revenue                 $ 549,000 $ 318,000        
Other Geographic Regions [Member]                            
Significant Accounting Policies (Details) [Line Items]                            
Revenue     $ 57,000 $ 184,000 $ 6,000 $ 30,000