Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Stockholders' Equity

Summary of stock option activity

The following table summarizes stock option activity for the nine months ended September 30, 2021 (shares and intrinsic value in thousands):

		Weighted-		Weighted- average
		average		remaining contractual	Aggregate intrinsic
	Number of shares	exercise price		term	value
Outstanding at December 31, 2020	3,935	$	11.69	5.1	$	291
Granted	600		12.02	6.0		—
Exercised	(50)		10.20	—		—
Forfeited	(8)		14.00	—		—
Expired	(40)		14.78	—		—
Outstanding at September 30, 2021	4,437	$	11.67	5.0	$	3,411
Vested at September 30, 2021	3,412	$	11.60	3.9	$	3,047
Exercisable at September 30, 2021	3,412	$	11.60	3.9	$	3,047

Summary of restricted share activity

The following table summarizes restricted share activity for the nine months ended September 30, 2021 (shares in thousands):

		Weighted-average
	Number of shares	grant date fair value
Outstanding at December 31, 2020	499	$	11.26
Granted	582		11.95
Vested	(522)		11.30
Forfeited	—		—
Outstanding at September 30, 2021	559	$	11.95

Time Based Restricted Stock Awards and Stock Option | Black Scholes Pricing Model

Stockholders' Equity

Schedule of valuation assumptions

	Nine Months Ended		Year Ended
Black-Scholes Option Valuation Assumptions	September 30, 2021		December 31, 2020
Risk-free interest rate	0.94% – 1.08	%		0.42% - 0.50	%
Dividend yield	—			—
Volatility	37.3% - 40.6	%		44.2% - 46.1	%
Weighted-average expected term (years)	6.0			6.0