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v3.8.0.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Operating Activities |  |
Net loss | $ (21,561,000) | $ (16,945,000)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Stock-based compensation expense | 863,000 | 635,000
Depreciation and amortization | 173,000 | 389,000
Loss (Gain) on sale of assets | 18,000 | (2,231,000)
Gain on extinguishment of redeemable convertible notes | 0 | (99,000)
Change in fair value of derivative liability |  | (1,057,000)
Changes in operating assets and liabilities: |  |
Prepaid and other current assets | (351,000) | 956,000
Accounts receivable | 7,000 | 461,000
Deposits | (128,000) |
Accounts payable | (90,000) | (102,000)
Accrued compensation and other accrued liabilities | 1,287,000 | (60,000)
Deferred revenue | (118,000) | (400,000)
Deferred rent | (40,000) | (19,000)
Net cash flows used in operating activities | (19,940,000) | (18,472,000)
Investing Activities |  |
Proceeds from maturities of short-term investments | 14,300,000 | 10,002,000
Purchase of investments | (25,472,000) | (13,401,000)
Proceeds from sale of assets |  | 1,674,000
Change in restricted cash | (57,000) | (5,000)
Proceeds from sale of property and equipment | 0 | 890,000
Purchases of property and equipment | (23,000) | (468,000)
Net cash flows used in investing activities | (11,252,000) | (1,308,000)
Financing Activities |  |
Release of restricted cash due to conversion and redemption of redeemable convertible notes | 14,318,000 | 14,330,000
Payments for the redemption of redeemable convertible notes | (14,318,000) | (14,340,000)
Proceeds from issuance of common stock, net of issuance costs | 5,336,000 | 958,000
Proceeds from issuance of preferred stock, common stock and warrants for follow-on offering, net of issuance costs | 18,563,000 |
Proceeds from exercise of warrants | 1,817,000 |
Net cash flows provided by financing activities | 35,400,000 | 948,000
Net increase (decrease) in cash and cash equivalents | 4,208,000 | (18,832,000)
Cash and cash equivalents at beginning of year | 10,264,000 | 29,096,000
Cash and equivalents at end of year | 14,472,000 | 10,264,000
Supplemental Disclosure of Non-Cash Investing and Financing Information: |  |
Deemed dividend for convertible preferred stock beneficial conversion feature | 3,951,000 |
Unrealized (Gain) Loss on investments | 1,000 | $ (2,000)
S-3 |  |
Financing Activities |  |
Proceeds from issuance of common stock, net of issuance costs | $ 9,684,000 |

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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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