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Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2019
Financial Instruments |
Summary of assets measured at fair value on a recurring basis | Below is a summary of assets measured at fair value on a recurring basis (in thousands):
|  | As of September 30, 2019
|  | Quoted Prices |  | Significant |  | Significant |  |
|  | in Active |  | Observable |  | Unobservable |  |
|  | Markets |  | Inputs |  | Inputs |  |
|  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 6,144 |  | $ | — |  | $ | — |  | $ | 6,144
Corporate debt securities |  |  | — |  |  | 7,506 |  |  | — |  |  | 7,506
Reverse repurchase agreements |  |  | — |  |  | 2,000 |  |  | — |  |  | 2,000
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  |  | — |  |  | 1,850 |  |  | — |  |  | 1,850
Reverse repurchase agreements |  |  | — |  |  | 21,000 |  |  | — |  |  | 21,000
Total assets |  | $ | 6,144 |  | $ | 32,356 |  | $ | — |  | $ | 38,500
|  | As of December 31, 2018
|  | Quoted Prices |  | Significant |  | Significant |  |
|  | in Active |  | Observable |  | Unobservable |  |
|  | Markets |  | Inputs |  | Inputs |  |
|  | (Level 1) |  | (Level 2) |  | (Level 3) |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 5,956 |  | $ | — |  | $ | — |  | $ | 5,956
Corporate debt securities |  |  | — |  |  | 1,948 |  |  | — |  |  | 1,948
Reverse repurchase agreements |  |  | — |  |  | 3,000 |  |  | — |  |  | 3,000
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  |  | — |  |  | 7,276 |  |  | — |  |  | 7,276
Reverse repurchase agreements |  |  | — |  |  | 15,000 |  |  | — |  |  | 15,000
Total assets |  | $ | 5,956 |  | $ | 27,224 |  | $ | — |  | $ | 33,180

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- Definition Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2C -URI http://asc.fasb.org/extlink&oid=99377789&loc=SL7498348-110258 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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