Stock Award Plans and Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Stock Option Activity

See below for a summary of the stock options granted under the 2011 and 2018 plans:

	2011 Plan	2018 Plan	Non Plan	Total
Beginning balance as of January 1, 2021	89	5,449,967	1	5,450,057
Granted		7,185,000		1,605,000
Exercised		(20,694)		(14,583)
Expired	(8)	(80,254)		(43,075)
Forfeited		(459,771)		(149,522)
Ending balance as of September 30, 2021	81	12,074,248	1	6,847,877

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

Key weighted-average assumptions used to apply this pricing model during nine months ended September 30, 2021 were as follows:

	For the Nine Months Ended September 30, 2021
Risk-free interest rate	0.59% - 0.75%
Expected life of option grants	5 years
Expected volatility of underlying stock	37.67% - 38.15%
Dividends assumption	--