Stock-Based Compensation (Tables)
|6 Months Ended|
Jun. 30, 2019
|Share-based Payment Arrangement [Abstract]|
|Share-based Payment Arrangement, Option, Activity [Table Text Block]||
Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.
Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef