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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Cash flows from operating activities: |  |
Net loss | $ (3,161,000) | $ (10,506,000)
Adjustments to reconcile net loss to cash used in operating activities: |  |
Depreciation and amortization | 335,000 | 174,000
Equity-based compensation | 985,000 | 928,000
Amortization of long-term debt issuance costs and fees | 35,000 | 86,000
Other | 356,000 | 36,000
Change in fair value of warrant liabilities | (157,000) | (256,000)
Changes in operating assets and liabilities: |  |
Unbilled revenue receivable and accounts receivable | 11,000 | 3,000
Prepaid expenses and other current assets | (1,551,000) | (257,000)
Other noncurrent assets | (1,034,000) | 112,000
Accounts payable | 22,000 | 403,000
Accrued expenses and other current liabilities | (647,000) | (66,000)
Deferred revenue | (13,949,000) | 541,000
Other noncurrent liabilities | (59,000) | (194,000)
Net cash used in operating activities | (18,814,000) | (8,996,000)
Cash flows from investing activities: |  |
Purchase of available for sale securities | (38,072,000) | 0
Proceeds from sale or maturity of available for sale securities | 32,103,000 | 0
Capital expenditures | (2,996,000) | (62,000)
Net cash used in investing activities | (8,965,000) | (62,000)
Cash flows from financing activities: |  |
Proceeds from common stock offering | 2,973,000 | 0
Proceeds from exercise of common stock options | 50,000 | 17,000
Repayment of long-term debt | 4,999,000 | 0
Payment of long-term debt fees and issuance costs | (100,000) | (52,000)
Payment of common stock financing costs | (207,000) | 0
Net cash used in financing activities | (2,283,000) | (35,000)
Net decrease in cash, cash equivalents, and restricted cash | (30,062,000) | (9,093,000)
Cash, cash equivalents, and restricted cash - beginning of period | 48,460,000 | 26,268,000
Cash, cash equivalents, and restricted cash - end of period | 18,398,000 | 17,175,000
Non-cash financing activities: |  |
Debt fees (accrued expenses) | 0 | 100,000
Non-cash investing activities: |  |
Capital expenditures (accounts payable and accrued expenses) | 60,000 | 14,000
Total cash, cash equivalents, and restricted cash shown in the unaudited condensed consolidated statements of cash flows | $ 18,398,000 | $ 17,175,000

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- Definition Amount of cash outflow to acquire investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3151-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the sale and maturity (principal being due) of other investments, prepayment and call (request of early payment) of other investments not otherwise defined in the taxonomy. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120381028&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + 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 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition Payments Of Common Stock Financing Costs + References No definition available. + Details
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