Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Share-based Payment Arrangement [Abstract]

Activity in Stock Award Plans

The activity in the Stock Plan is displayed in the following table:

Authorized Shares Available for Future Award Grants	Nine Months Ended September 30, 2021	From Inception to September 30, 2021
Beginning balance	700,680	1,900,000
Additional shares authorized	650,000	2,150,000
Number of awards granted	(161,857)	(3,450,756)
Number of awards forfeited or expired	56,750	646,329
Ending balance	1,245,573	1,245,573
Number of option awards exercised	7,884	1,481,973
Number of unrestricted stock awards granted	—	10,090
Number of restricted stock awards vested	52,302	216,680

The activity in the Director Stock Plan is displayed in the following table:

Authorized Shares Available for Future Award Grants	Nine Months Ended September 30, 2021	From Inception to September 30, 2021
Beginning balance	160,135	300,000
Additional authorization	—	150,000
Number of awards granted	(18,510)	(332,378)
Number of awards forfeited or expired	2,727	26,730
Ending balance	144,352	144,352
Number of option awards exercised	8,181	142,001
Number of restricted stock awards vested	—	98,491

Remaining Stock-Based Compensation Expense

We expect this compensation to be recognized over the remainder of 2021 and subsequent years according to the table below, except with respect to awards that are accelerated by the Board of Directors, in which case we will recognize any remaining compensation expense in the period in which the awards are accelerated.

2021	$	973
2022	2,402
2023	1,339
2024	251
2025	12
Total	$	4,977