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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs
The following table reflects the components of stock-based compensation expense recognized in the Company's Consolidated Statements of Operations:
Year Ended
December 31,
20212020
Phantom units:
Cost of revenue— 27 
Selling, general and administrative—(23)
Research and development—36
Total phantom units stock-based compensation expense— 40 
Stock options:
Cost of revenue188100 
Selling, general and administrative3,012 1,688
Research and development424 246
Total stock options stock-based compensation expense3,6242,034
Restricted stock units:
Cost of revenue— 9
Selling, general and administrative128621
Research and development—23
Total restricted stock units stock-based compensation expense128 653
Related party share based payments
Selling, general and administrative67—
Research and development68—
Total related party stock-based compensation expense135—
Discontinued operations—(79)
Total stock-based compensation expense3,8872,648
Amount capitalized to internal-use software11897
Total stock-based compensation cost$4,005 $2,745 
Schedule of Share-based Compensation, Activity
The following table summarizes the activity related to the unvested phantom units during the year ended December 31, 2020.
Number of UnitsWeighted-Average Grant-Date Fair Value
Unvested phantom units outstanding - December 31, 2019120,562 $11.49 
Vested (111,699)$11.32 
Forfeited (8,863)$14.26 
Unvested phantom units outstanding - December 31, 2020— $— 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes the weighted-average assumptions used to value stock options at their grant date and the weighted-average grant-date fair value per share:
Year Ended December 31,
20212020
Expected volatility70.37 %71.94 %
Expected term to exercise from grant date6.0 years6.2 years
Risk-free rate0.94 %0.41 %
Expected dividend yield— %— %
Weighted-average grant-date fair value per share of options$1.24 $2.39 
Share-based Payment Arrangement, Option, Activity
The following table summarizes the activity related to stock options during the year ended December 31, 2021:
 Number of 
Shares		Weighted-Average
Exercise Price		Weighted-Average Remaining Contractual LifeAggregate Intrinsic Value
Stock options outstanding - December 31, 20195,815,724 $0.56 
Granted5,195,000 $3.76 
Exercised(260,600)$0.55 $780 
Forfeited(725,000)$1.03 
Stock options outstanding - December 31, 202010,025,124 $2.19 9.1 years$13,372 
Granted7,090,000 $2.00 
Exercised(504,488)$0.55 $915 
Forfeited(2,135,000)$2.80 $743 
Stock options outstanding - December 31, 202114,475,636 $2.06 8.8 years$1,987 
Stock options exercisable - December 31, 20214,469,386 $1.40 7.9 years$1,560 
Schedule of Nonvested Restricted Stock Units Activity
The following table summarizes the activity related to the unvested restricted stock units during the years ended December 31, 2021 and 2020:
 Number of Units
Weighted-Average Grant-Date
Fair Value
Unvested restricted stock units outstanding - December 31, 2019705,415 $2.68 
Granted179,558 $1.81 
Vested(540,711)$3.10 
Forfeited(90,954)$1.41 
Unvested restricted stock units outstanding - December 31, 2020253,308 $1.64 
Vested(118,603)$1.52 
Forfeited(15,000)$1.23 
Unvested restricted stock units outstanding - December 31, 2021119,705 $1.81