CONVERTIBLE NOTES (Tables)

12 Months Ended

Dec. 31, 2020

Short-term Debt [Line Items]

Schedule of interest expense information related to the Convertible Notes

	Year Ended
	December 31,
	2019
Amortization of issuance costs allocated to Convertible Notes	$	494
Amortization of debt discount from contingent forward contracts (Note 6)		2,900
Total interest expense	$	3,394

Schedule of convertible notes

Convertible Notes issued in 2018	$	210,000
Debt discount and debt issuance cost incurred		(22,763)
Amortization of debt discount and issuance cost		1,623
Convertible Notes balance as of December 31, 2018		188,860
Convertible Notes issued in 2019		90,000
Debt discount and debt issuance cost incurred		(19,051)
Amortization of debt discount and issuance cost		3,394
Convertible Notes balance as of April 2, 2019		263,202
Accrued interest of Convertible Notes		8,782
Convertible Notes converted to Series D convertible preferred shares	$	271,984