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v3.10.0.1

Statements of Cash Flows - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Cash flows from operating activities |  |
Net loss | $ (52,210) | $ (45,853)
Adjustments to reconcile net loss to net cash used in operating activities |  |
Depreciation and amortization | 2,368 | 1,420
Amortization of premium on marketable securities | 68 | 2,148
Stock-based compensation | 15,473 | 10,211
Abandonment of capitalized intangible assets | 118 | 273
Loss (gain) on disposal of assets | 110 | (2)
Changes in operating assets and liabilities: |  |
Accounts receivable | (1,320) | 7,785
Interest receivable | (624) | (602)
Prepaid expenses and other assets | (6,535) | (3,971)
Accounts payable | (886) | 2,722
Accrued expenses | 192 | (2,056)
Income taxes | (156) | (65)
Deferred rent | 466 | 359
Deferred revenue | (20,039) | 700
Net cash used in operating activities | (62,975) | (26,931)
Cash flows from investing activities |  |
Purchase of marketable securities | (331,126) | (49,203)
Purchase of intangible assets | (1,302) | (1,520)
Purchase of property and equipment | (4,425) | (3,832)
Proceeds from maturities of marketable securities | 165,134 | 77,566
Repayment (issuance) of loan | 86 | (86)
Net cash provided by (used in) investing activities | (171,633) | 22,925
Cash flows from financing activities |  |
Proceeds from issuance of common stock upon exercise of stock awards | 7,068 | 2,669
Proceeds from issuance of common stock under the Employee Stock Purchase Plan | 504 | 443
Proceeds from issuance of common stock | 260,245 |
Common stock issuance costs | (14,741) |
Net cash provided by financing activities | 253,076 | 3,112
Net increase (decrease) in cash and cash equivalents | 18,468 | (894)
Cash and cash equivalents, beginning of period | 16,528 | 14,528
Cash and cash equivalents, end of period | 34,996 | 13,634
Cash paid during the period for: |  |
Interest | 9 | 8
Taxes | 170 | 790
Supplemental disclosures of non-cash investing activities |  |
Unrealized gain (loss) on marketable securities, net of tax | $ (530) | $ 344

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- Definition The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3521-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3044-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=98513485&loc=SL98516268-108586 + Details
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