401(k) Plan	12 Months Ended
Dec. 31, 2018
Defined Contribution Plan [Abstract]
Description of 401(K) Plan	NOTE P — 401(k) PLAN We have a 401(k) retirement plan (the "Plan") that covers substantially all employees and entitles them to contribute up to 70% of their annual compensation, subject to maximum limitations imposed by the Internal Revenue Code. We have historically matched 50% of each employee’s contribution up to 6% of annual compensation, subject to certain limitations as outlined in the Plan. Beginning in May 2016, we suspended the matching of employee contributions for an indefinite period. In August 2017, the matching of employee contributions was reinstated. Effective October 1, 2018, enhancements were made to the plan, including changing the employer match to 100% of each employee's contribution up to 4%. Additionally, participants will be 100% vested in employer match contributions after 3 years of service, instead of after 5 years of service. In addition, we can make discretionary contributions which are allocable to participants in accordance with the Plan. Total expense related to our 401(k) plan was $3.8 million, $0.9 million, and $1.4 million in 2018, 2017, and 2016, respectively.

401(k) Plan

12 Months Ended

Dec. 31, 2018

Defined Contribution Plan [Abstract]

NOTE P — 401(k) PLAN

We have a 401(k) retirement plan (the "Plan") that covers substantially all employees and entitles them to contribute up to 70% of their annual compensation, subject to maximum limitations imposed by the Internal Revenue Code. We have historically matched 50% of each employee’s contribution up to 6% of annual compensation, subject to certain limitations as outlined in the Plan. Beginning in May 2016, we suspended the matching of employee contributions for an indefinite period. In August 2017, the matching of employee contributions was reinstated. Effective October 1, 2018, enhancements were made to the plan, including changing the employer match to 100% of each employee's contribution up to 4%. Additionally, participants will be 100% vested in employer match contributions after 3 years of service, instead of after 5 years of service. In addition, we can make discretionary contributions which are allocable to participants in accordance with the Plan. Total expense related to our 401(k) plan was $3.8 million, $0.9 million, and $1.4 million in 2018, 2017, and 2016, respectively.