3. Accounting for Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Valuation assumptions for stock-based compensation

The fair values of employee and director option awards were estimated at the date of grant using a Black-Scholes option-pricing model with the following assumptions:

	For Three Months Ended March 31, 2021			For Three Months Ended March 31, 2020
Weighted average grant date fair value	$	13.88			–
Weighted average assumptions used:
Expected dividend yield		0.0	%		–
Risk-free interest rate		0.67	%		–
Expected volatility		73.00	%		–
Expected life (in years)		5.0			–