Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Share-based Compensation [Abstract]

Activity in Stock Award Plans

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

Authorized Shares Available for Future Award Grants	Six Months Ended June 30, 2018		From Inception to June 30, 2018
Beginning balance	61,813		300,000
Number of awards granted	(12,650	)	(274,840	)
Number of awards forfeited or expired	—		24,003
Ending balance	49,163		49,163
Number of option awards exercised	15,599		104,880
Number of restricted stock awards vested	17,269		71,541

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

Authorized Shares Available for Future Award Grants	Six Months Ended June 30, 2018		From Inception to June 30, 2018
Beginning balance	996,828		1,900,000
Additional shares authorized	—		1,500,000
Number of awards granted	(157,527	)	(3,029,498	)
Number of awards forfeited or expired	37,394		506,193
Ending balance	876,695		876,695
Number of option awards exercised	198,726		1,284,621
Number of unrestricted stock awards granted	—		8,470
Number of restricted stock awards vested	19,658		57,826

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	$	2,636
2019	4,026
2020	2,348
2021	542
2022	37
Total	$	9,589