Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 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	Three Months Ended March 31, 2021	From Inception to March 31, 2021
Beginning balance	700,680	1,900,000
Additional shares authorized	—	1,500,000
Number of awards granted	(153,260)	(3,442,159)
Number of awards forfeited or expired	32,169	621,748
Ending balance	579,589	579,589
Number of option awards exercised	4,500	1,478,589
Number of unrestricted stock awards granted	—	10,090
Number of restricted stock awards vested	51,902	216,280

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

Authorized Shares Available for Future Award Grants	Three Months Ended March 31, 2021	From Inception to March 31, 2021
Beginning balance	160,135	300,000
Additional authorization	—	150,000
Number of awards granted	—	(313,868)
Number of awards forfeited or expired	2,727	26,730
Ending balance	162,862	162,862
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	$	2,565
2022	2,216
2023	1,372
2024	231
2025	12
Total	$	6,396