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STOCK-BASED COMPENSATION (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2021

Dec. 31, 2020

STOCK-BASED COMPENSATION

Summary of activity under the Plan

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Options Available for Grant

Number of Options Outstanding

Weighted- Average Exercise Price Per Share

Weighted- Average Remaining Contractual Life (years)

Aggregate Intrinsic Value (in thousands)

Balances as of December 31, 2020

​

11,048

​

51,379,939

​

$

0.56

​

7.21

​

$

46,516

​

Options granted

​

(18,335)

​

18,335

​

​

3.47

​

​

​

​

​

​

Options exercised

​

​

​

(6,465,857)

​

​

0.43

​

​

​

​

​

​

Options forfeited

​

18,335

​

(18,335)

​

​

0.51

​

​

​

​

​

​

Balances as of March 31, 2021

​

11,048

​

44,914,082

​

$

0.58

​

7.05

​

$

202,792

​

Options vested and exercisable — March 31, 2021

​

​

​

32,204,617

​

$

0.46

​

6.30

​

$

149,536

​

A summary of activity under the Plan is as follows:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Weighted-

Weighted-

​

​

​

​

​

​

​

​

Average

​

Average

​

Aggregate

​

​

Options

Number of

Exercise

​

Remaining

​

Intrinsic

​

​

Available

Options

Price Per

​

Contractual

​

Value (in

​

​

for Grant

Outstanding

Share

​

Life (years)

​

thousands)

Balances as of December 31, 2019

4,299,140

42,846,649

​

$

0.34

6.82

​

$

5,821

Increase to options available under Plan

5,242,189

—

​

​

Options granted

(10,932,615)

10,932,615

​

1.23

​

Options exercised

—

(996,991)

​

0.38

​

Options forfeited

870,317

(870,317)

​

0.49

​

Options expired

532,017

(532,017)

​

0.35

​

Balances as of December 31, 2020

11,048

51,379,939

​

$

0.56

7.21

​

$

46,516

Options vested and exercisable – December 31, 2020

​

37,219,281

​

$

0.45

​

6.48

​

$

37,854

Stock-based compensation expense

The following table summarizes stock-based compensation expense recorded in each component of operating expenses in the Company’s consolidated statements of operations and comprehensive loss (in thousands):

​

​	​	​	​	​	​	​	​
​	​	Three Months Ended March 31,
​		2021			2020		​
Sales and marketing	​	$	84	​	$	63	​
Research and development	​	​	155	​	​	167	​
General and administrative	​	​	521	​	​	226	​
Total stock-based compensation expense	​	$	760	​	$	456	​

The following table summarizes stock-based compensation expense recorded in each component of operating expenses in the Company’s consolidated statements of operations and comprehensive loss for the years ended December 31, 2020 and 2019 (in thousands):

​	​	​	​	​	​	​
​	​	Year Ended December 31,
​		2020			2019
Sales and marketing	​	$	396	​	$	364
Research and development	​		1,211	​		901
General and administrative	​		2,935	​		266
Total stock-based compensation expense	​	$	4,542	​	$	1,531

​

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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