XML 21 R9.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Cash Equivalents and Marketable Securities | 9 Months Ended
--- | ---
Sep. 30, 2018
Investments Debt And Equity Securities [Abstract] |
Cash Equivalents and Marketable Securities | 3. Cash Equivalents and Marketable Securities The following tables summarize the estimated fair value of the Company’s cash equivalents and marketable securities and the gross unrealized gains and losses (in thousands):
|  | September 30, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 6,550 |  |  | $ | — |  |  | $ | — |  |  | $ | 6,550 |
Reverse repurchase agreements |  |  | 6,250 |  |  |  | — |  |  |  | — |  |  |  | 6,250 |
Total cash equivalents |  |  | 12,800 |  |  |  | — |  |  |  | — |  |  |  | 12,800 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  |  | 32,236 |  |  |  | 2 |  |  |  | (8 | ) |  |  | 32,230 |
U.S. government securities |  |  | 18,000 |  |  |  | — |  |  |  | (27 | ) |  |  | 17,973 |
Total marketable securities |  | $ | 50,236 |  |  | $ | 2 |  |  | $ | (35 | ) |  | $ | 50,203 |
|  | December 31, 2017 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 1,674 |  |  | $ | — |  |  | $ | — |  |  | $ | 1,674 |
Reverse repurchase agreements |  |  | 7,250 |  |  |  | — |  |  |  | — |  |  |  | 7,250 |
Total cash equivalents |  |  | 8,924 |  |  |  | — |  |  |  | — |  |  |  | 8,924 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  |  | 1,502 |  |  |  | — |  |  |  | (1 | ) |  |  | 1,501 |
U.S. government securities |  |  | 36,082 |  |  |  | — |  |  |  | (101 | ) |  |  | 35,981 |
Total marketable securities |  | $ | 37,584 |  |  | $ | — |  |  | $ | (102 | ) |  | $ | 37,482 |
The reverse repurchase agreements are settled in cash nightly, and as such are classified as cash equivalents. As of September 30, 2018 and December 31, 2017, all debt securities with an unrealized loss position have been in a loss position for less than one year. The aggregate fair value of debt securities in an unrealized loss position as of September 30, 2018 and December 31, 2017 were $31.5 million and $37.5 million, respectively, with no individual securities in a significant unrealized loss position. The Company evaluated its securities for other-than-temporary impairment and considered the decline in market value for the securities to be primarily attributable to current economic and market conditions and would not be required to sell the securities before recovery of the amortized cost basis. Based on this analysis, these marketable securities were not considered to be other-than-temporarily impaired as of September 30, 2018 and December 31, 2017. The following tables summarizes the contractual maturities of the Company’s marketable securities at estimated fair value (in thousands):
|  | September 30, |  |  | December 31, |
|  | 2018 |  |  | 2017 |
Due in one year or less |  | $ | 50,203 |  |  | $ | 34,498 |
Due in 1 - 2 years |  |  | — |  |  |  | 2,984 |
Total marketable securities |  | $ | 50,203 |  |  | $ | 37,482 |
The Company may sell investments at any time for use in current operations even if they have not yet reached maturity. As a result, the Company classifies marketable securities, including securities with maturities beyond twelve months as current assets.

X
- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
Name: | us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration