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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
CONSOLIDATED BALANCE SHEETS
Due from related parties	$ 1,485	$ 123	$ 483
Note payable	45,385	45,271	24,102
Accounts payable - related party	$ 321	$ 399	$ 190
Shares subject to possible redemption, par value (in dollars per share)	$ 0.00001	$ 0.00001	$ 0.00001
Authorized shares	409,351,021	409,351,021	321,346,716
Convertible preferred stock, shares issued (in shares)	175,528,225	175,437,783	191,139,933
Outstanding shares	175,528,225	175,437,783	191,139,933	186,466,181
Liquidation preference	$ 258,084	$ 257,947	$ 258,041
Preferred stock, par value	$ 0.00001	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	4,305	4,305	4,305
Preferred stock, shares issued	2,961	2,961	2,961
Preferred stock, shares outstanding	2,961	2,961	2,961
Common stock, par value	$ 0.000001	$ 0.000001	$ 0.000001
Common stock, shares authorized (in shares)	474,728,323	474,728,323	386,728,323
Common stock, shares issued (in shares)	17,694,228	11,228,371	9,392,682
Common stock, shares outstanding	17,694,228	11,228,371

X

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Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Face amount or stated value per share of common stock.

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The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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