pre_text: Item 6. Selected Financial Data The following tables set forth our selected financial data for the periods and at the dates indicated. The selected financial data from the consolidated statements of operations and consolidated statements of cash flows for the years ended December 31, 2019, 2018, and 2017 and the selected financial data from the consolidated balance sheets as of December 31, 2019 and 2018 have been derived from the audited consolidated financial statements included in this Annual Report on Form 10-K. The selected financial data from the consolidated statements of operations and consolidated statements of cash flows for the years ended December 31, 2016 and 2015 and the selected financial data from the consolidated balance sheets as of December 31, 2017, 2016, and 2015 have been derived from audited consolidated financial statements not included in this Annual Report on Form 10-K. The information presented below should also be read in conjunction with our consolidated financial statements and the related notes thereto and Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”
table: Years Ended December 31,
table: 2019 2018 2017 2016 2015
table: (In thousands, except per share amounts)
table: Net sales . $3,063,117 $2,244,044 $2,941,324 $2,904,563 $4,112,650
table: Gross profit 549,212 392,177 548,947 638,418 1,132,762
table: Operating (loss) income . (161,785) 40,113 177,851 (568,151) 730,159
table: Net (loss) income (114,933) 144,326 (165,615) (416,112) 593,406
table: Net (loss) income per share:
table: Basic . $(1.09) $1.38 $(1.59) $(4.05) $5.88
table: Diluted . $(1.09) $1.36 $(1.59) $(4.05) $5.83
table: Cash dividends declared per common share. $— $— $— $— $—
table: Net cash provided by (used in) operating
table: activities $174,201 $(326,809) $1,340,677 $206,753 $(325,209)
table: Net cash (used in) provided by investing
table: activities (362,298) (682,714) (626,802) 144,520 (156,177)
table: Net cash provided by (used in) financing
table: activities 74,943 255,228 192,045 (136,393) 101,207
table: December 31,
table: 2019 2018 2017 2016 2015
table: (In thousands)
table: Cash and cash equivalents . $1,352,741 $1,403,562 $2,268,534 $1,347,155 $1,126,826
table: Marketable securities . 811,506 1,143,704 720,379 607,991 703,454
table: Total assets . 7,515,689 7,121,362 6,864,501 6,824,368 7,360,392
table: Total long-term debt 471,697 466,791 393,540 188,388 289,415
table: Total liabilities 2,418,922 1,908,959 1,765,804 1,606,019 1,741,996
table: Total stockholders’ equity . 5,096,767 5,212,403 5,098,697 5,218,349 5,618,396
question: Analyse this data from a financial earnings document. What is the difference between Net (loss) income in 2018 and 2019?