For the year ended December 31, 2018, we had GAAP diluted net loss per share under ASC 605 of $0.14. We also had non-GAAP diluted net income per share under ASC 605 of $0.92, which was 35% higher than a year ago.
Cash, cash equivalents, and marketable securities as of December 31, 2018 were $277.8 million, an increase of $29.6 million from September 30, 2018, mainly due to $35.1 million in cash provided by operating activities. Adjusted EBITDA under ASC 605 for the quarter would have been $43.0 million.
2019 First Quarter Outlook
The Company will discuss revenue guidance for the first quarter of 2019 during its upcoming conference call. The following table sets forth first quarter outlook for other measures.
(In millions) | GAAP | Non-GAAP (1) | ||
Total operating costs and expenses | $78 - $74 | $66 - $62 | ||
Interest and other income (expense), net | $3 | ($1) | ||
Diluted share count | 110 | 110 | ||
(1) | See “Reconciliation of GAAP Forward Looking Estimates to Non-GAAP Forward Looking Estimates” tables included below. | ||||