PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)

12 Months Ended

Dec. 31, 2021

Prepaid Expense And Other Assets Current [Abstract]

Summary of prepaid expenses and other assets

	As of December 31,
	2020		2021
	US$		US$
IPO distribution service and promotional and advertisement service receivables		5,360,831		3,588,851
Prepaid data and IT service expenses		1,315,469		2,226,216
Prepaid income taxes		—		1,978,308
Rental and other deposits		391,625		1,885,272
Advances to employees		825,682		1,458,582
Prepaid professional service fees		998,235		1,225,020
Prepaid marketing expenses		402,724		1,073,965
Wealth management service fees receivables		—		727,209
Input VAT receivables		1,174,934		529,985
Interest receivables from term deposits		429,454		117,392
Others		315,476		1,240,823
Total		11,214,430		16,051,623