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Stock Options and Restricted Shares (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 04, 2021
$ / shares
Jun. 20, 2020
shares
Aug. 08, 2019
Mar. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
$ / shares
shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Mar. 31, 2020
$ / shares
shares
Stock Options and Restricted Shares (Details) [Line Items]              
Exercisable period of options granted       1 year 4 months 9 days 2 years 4 months 9 days    
Stock options and restricted shares, description           The number of restricted shares to be vested will be based on the aggregate amount of qualified revenues brought by the consultants to the Group during the 3-year vesting period from January 4, 2021 to January 4, 2024.  
Restricted price per share | $ / shares       $ 1.97      
Stock option granted           40,000 410,000
Number of directors   2          
Restricted share issued   500,000          
Stock option price per share | $ / shares           $ 0.66 $ 0.33
Aggregate intrinsic values | $       $ 16 $ 298    
Common Stock Exercise Price | $ / shares       $ 2.04 $ 2.82    
Employees restricted shares             175,000
Weighted-average period       1 year 4 months 9 days 2 years 4 months 9 days 3 years 4 months 9 days  
Board of Director [Member]              
Stock Options and Restricted Shares (Details) [Line Items]              
Stock option granted   40,000          
Option Plan 2010 [Member]              
Stock Options and Restricted Shares (Details) [Line Items]              
Exercisable period of options granted       5 years      
Stock issued during period, shares, restricted stock       600,000      
Stock options and restricted shares, description On January 4, 2021, the Board of Directors granted awards for a total of 15,000 restricted shares at share price $4.12 to three consultants (5,000 restricted shares to each consultant) based in Germany under the 2020 Option Plan. The number of restricted shares to be vested will be based on the aggregate amount of qualified revenues brought by the consultants to the Group during the 3-year vesting period from January 4, 2021 to January 4, 2024.   the Board of Directors of the Company granted awards for a total of 585,000 shares of stock options and restricted shares under the Company’s 2010 Option Plan. The awards consisted of 160,000 non-qualified share options to 20 key employees, 250,000 non-qualified share options to 7 directors of the Company, including 60,000 options to the Company’s Chief Executive Officer and Chairman of the Board, and 175,000 restricted shares to 12 managers and key employees.        
Repurchase the restricted, description             The restricted shares will vest in five years. In the event that any recipient’s employment with the Group is terminated before August 8, 2024, the Company will have the right to repurchase the restricted shares at a price of $0.01 per share.
Compensation expense | $         $ 89 $ 73  
Unrecognized compensation cost | $         $ 198 $ 287  
Restricted Stock [Member]              
Stock Options and Restricted Shares (Details) [Line Items]              
Exercisable period of options granted       5 years      
Restricted price per share | $ / shares       $ 0.01      
Repurchase of restricted shares       190,000 190,000 190,000  
Price per share | $ / shares       $ 0.01 $ 0.01 $ 0.01  
Option Plan 2020 [Member]              
Stock Options and Restricted Shares (Details) [Line Items]              
Exercisable period of options granted   5 years          
Restricted share issued           15,000  
Stock option price per share | $ / shares $ 4.12            
Compensation expense | $       $ 89      
Unrecognized compensation cost | $       $ 109