Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Share-based Compensation [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, 2018		From Inception to March 31, 2018
Beginning balance	996,828		1,900,000
Additional shares authorized	—		1,500,000
Number of awards granted	(153,209	)	(3,025,180	)
Number of awards forfeited or expired	12,162		480,961
Ending balance	855,781		855,781
Number of option awards exercised	89,057		1,174,952
Number of unrestricted stock awards granted	—		8,470
Number of restricted stock awards vested	19,658		57,826

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

Authorized Shares Available for Future Award Grants	Three Months Ended March 31, 2018	From Inception to March 31, 2018
Beginning balance	61,813	300,000
Number of awards granted	—	(262,190	)
Number of awards forfeited or expired	—	24,003
Ending balance	61,813	61,813
Number of option awards exercised	7,599	96,880
Number of restricted stock awards vested	—	54,272

Remaining Stock-Based Compensation Expense

We expect this compensation to be recognized over the remainder of 2018 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.

2018	$	3,614
2019	3,856
2020	2,397
2021	552
2022	39
Total	$	10,458