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, 2019 or ☐ Transition report pursuant to section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 001-37389 | --- | --- | --- | |--------------------------------------------------------------|-----------------------------------------------------------------------|---------------- ...