Annual report pursuant to Section 13 and 15(d)

SHAREHOLDERS' EQUITY - Ordinary Shares (Details)

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SHAREHOLDERS' EQUITY - Ordinary Shares (Details)
 1 Months Ended 12 Months Ended
Apr. 08, 2019
$ / shares
shares
Apr. 30, 2019
shares
Dec. 31, 2020
item
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Apr. 05, 2019
shares
Shareholders' Equity          
Common stock, shares authorized     200,000,000 200,000,000  
Common stock, par value (in dollars per share) | $ / shares $ 0.0001   $ 0.0001 $ 0.0001  
Number of vote for each share | item     1    
Common stock, shares outstanding     8,108,271 7,995,127  
Initial shareholders' ownership after initial public offering per agreement (as a percent)     20.00%    
Common stock, shares issued     8,108,271 7,995,127  
Shares subject to possible redemption     27,829,229 27,942,373  
Founder Shares were no longer subject to forfeiture         937,500
Over-allotment option          
Shareholders' Equity          
Common stock, shares outstanding       937,500  
Sale of units in initial public offering, gross (in shares) 3,750,000        
IPO          
Shareholders' Equity          
Common stock, shares outstanding     35,937,500    
Common stock, shares issued     35,937,500    
Sale of units in initial public offering, gross (in shares) 28,750,000 28,750,000