Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2018 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 | --- | --- | --- | --- | |-----------------------------------------------------------------------------------------------------|--------------------------------------------------------|---- ...