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SHARE-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based Payment Arrangement, Expensed and Capitalized, Amount
The following table summarizes the total share-based compensation expense included in the condensed consolidated statements of operations and comprehensive income (loss):
For the Three Months Ended
September 30,		For the Nine Months Ended
September 30,
(in thousands)2021202020212020
Selling, general and administrative$1,093 $1,745 $3,166 $5,671 
Total stock-based compensation expense$1,093 $1,745 $3,166 $5,671 
Share-based Payment Arrangement, Option, Activity
Stock option activity and information about stock options outstanding are summarized in the following table:
Stock Option Awards
Weighted Average Exercise Price
Weighted Average Remaining Contractual Life (Years)
Outstanding at December 31, 20205,621,364 $7.94 9.20
Granted587,001 13.35 
Exercised(172,728)7.86 
Forfeited(399,483)8.78 
Outstanding at September 30, 20215,636,154 7.68 8.49
Vested or expect to vest as of September 30, 20215,636,154 7.68 8.49
Vested and Exercisable as of September 30, 20212,084,658 7.80 8.36
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions The fair value of the options granted during the year were estimated on the date of the grant using the Black-Scholes Merton model based on the following assumptions:
2021 Grants
Expected term (years)6.11
Expected volatility45 %
Risk free interest rate1.11 %
Expected dividend yield— %
Share-based Payment Arrangement, Restricted Stock Unit, Activity Activity and information about non-vested RSUs outstanding are summarized in the following table:
Restricted Stock Units
Weighted Average Grant Date Fair Value (in thousands)
Outstanding at December 31, 2020— $— 
Granted207,081 2,661 
Vested(8,152)(75)
Forfeited(44,643)(580)
Outstanding at September 30, 2021154,286 $2,006 
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award
LTI Awards
Outstanding as of December 31, 202054
Forfeited(10)
Outstanding as of September 30, 202144