Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation (Tables)

v3.22.0.1
Stock-based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of Shares Available for Future Grant The 2014 Plan has since been amended and restated with approval by the stockholders to increase the maximum number of shares issuable, as shown in the table below:
Original share pool 137 
2015 increase 111 
June 2017 increase 67 
December 2017 increase (ratified in June 2018) 293 
2019 increase 233 
March 2020 increase 333 
December 2020 increase 800 
Total share authorized for grant as of December 31, 2021 1,974 
Shares available for future grant under the 2014 Plan was as follows:
Shares Available For Grant
Available as of December 31, 2020 1,113 
Granted (620)
Forfeited 71 
Expired 23 
Available as of December 31, 2021 587 
Summary of Stock Option Activity
A summary of the stock option activity during the year ended December 31, 2021 is presented below:
Options
Outstanding		 Weighted
Average
Exercise
Price		 Weighted
Average
Remaining
Contractual
Life (Years)		 Aggregate
Intrinsic
Value
Outstanding at beginning of year 529  $ 31.62 
Forfeited (15) $ 8.65 
Expired (23) $ 27.01 
Outstanding at end of year 491  $ 32.53  6.41 $ — 
Vested and expected to vest 491  $ 32.53  6.41 $ — 
Exercisable at year end 405  $ 36.41  6.16 $ — 
The following table summarizes information about stock options outstanding as of December 31, 2021:
Options Outstanding Options Exercisable
Range of
Exercise
Prices		 Number of
Shares		 Weighted-Average
Remaining
Contractual Life
(Years)		 Weighted
Average
Price		 Number of
Shares		 Weighted
Average
Price
$5.55 - $9.15
 187  7.9 $ 7.84  127  $ 7.34 
$16.95 - $27.30
 139  6.7 $ 24.12  120  $ 24.35 
$27.45 - $54.15
 93  6.2 $ 35.49  85  $ 35.48 
$56.70 - $229.95
 72  2.7 $ 108.36  72  $ 108.36 
491  6.4 $ 32.53  405  $ 36.41 
Summary of Share Fair Value of Each Stock Option on Date of Grant using Black-Scholes Model Assumptions The share fair value of each stock option was determined on the date of grant using the Black-Scholes Model under the following assumptions:
Years Ended December 31,
2021 2020
Dividend yield N/A —
Risk-free interest rate N/A
1.44% - 1.7%
Expected term (in years) N/A
5.27 - 6.08
Volatility N/A
100%-102%
Schedule of Unvested Restricted Stock Units Activity
Combined RSU and PSU activity for the year ended December 31, 2021 is summarized below:
Number of
Shares
 Weighted
Average Grant-
Date Fair Value
Unvested as of January 1, 2021 143  $ 6.21 
Granted 620  $ 5.70 
Vested (52) $ 6.25 
Forfeited (56) $ 7.69 
Unvested as of December 31, 2021 655  $ 5.63 
Schedule of Stock-based Compensation Expense Related to Stock Options and RSUs Granted to Employees and Non-employees Stock-based compensation expense related to stock options, RSUs and PSUs granted to employees and non-employees was as follows:
Years Ended December 31,
2021 2020
Sales and marketing $ 450  $ 476 
Research and development 270  293 
General and administrative 1,609  1,641 
$ 2,329  $ 2,410