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Cash, Cash Equivalents And Investments | 9 Months Ended
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Sep. 30, 2017
Cash, Cash Equivalents And Investments [Abstract] |
Cash, Cash Equivalents And Investments | NOTE 4. CASH, CASH EQUIVALENTS AND INVESTMENTS The following tables summarize our cash, cash equivalents and investments as of September 30, 2017 and December 31, 2016 (in thousands): ﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | As of September 30, 2017
﻿ |  |  | Gross |  | Gross |  |
﻿ | Amortized |  | unrealized |  | unrealized |  | Fair
﻿ | Cost |  | gains |  | losses |  | Value
﻿Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
﻿Cash and money market funds | $ | 22,283 |  | $ | — |  | $ | — |  | $ | 22,283
﻿Commercial paper |  | 3,648 |  |  | — |  |  | — |  |  | 3,648
﻿Total cash and cash equivalents |  | 25,931 |  |  | — |  |  | — |  |  | 25,931
﻿Investments: |  |  |  |  |  |  |  |  |  |  |
﻿Commercial paper |  | 23,881 |  |  | 2 |  |  | (1) |  |  | 23,882
﻿Corporate debt securities |  | 9,399 |  |  | 1 |  |  | (1) |  |  | 9,399
﻿US government & agency securities |  | 24,756 |  |  | — |  |  | (3) |  |  | 24,753
﻿Total investments |  | 58,036 |  |  | 3 |  |  | (5) |  |  | 58,034
﻿Total cash, cash equivalents and investments | $ | 83,967 |  | $ | 3 |  | $ | (5) |  | $ | 83,965
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿Long-term restricted cash: |  |  |  |  |  |  |  |  |  |  |
﻿Cash | $ | 4,500 |  | $ | — |  | $ | — |  | $ | 4,500
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | As of December 31, 2016
﻿ |  |  | Gross |  | Gross |  |
﻿ | Amortized |  | unrealized |  | unrealized |  | Fair
﻿ | Cost |  | gains |  | losses |  | Value
﻿Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |
﻿Cash and money market funds | $ | 14,516 |  | $ | — |  | $ | — |  | $ | 14,516
﻿Commercial paper |  | 2,249 |  |  | — |  |  | — |  |  | 2,249
﻿Total cash and cash equivalents |  | 16,765 |  |  | — |  |  | — |  |  | 16,765
﻿Investments: |  |  |  |  |  |  |  |  |  |  |
﻿Commercial paper |  | 23,581 |  |  | 5 |  |  | (3) |  |  | 23,583
﻿Corporate debt securities |  | 10,741 |  |  | 1 |  |  | (3) |  |  | 10,739
﻿Asset backed securities |  | 312 |  |  | — |  |  | — |  |  | 312
﻿US government & agency securities |  | 20,574 |  |  | 7 |  |  | (2) |  |  | 20,579
﻿Total investments |  | 55,208 |  |  | 13 |  |  | (8) |  |  | 55,213
﻿Total cash, cash equivalents and investments | $ | 71,973 |  | $ | 13 |  | $ | (8) |  | $ | 71,978
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿Long-term restricted cash: |  |  |  |  |  |  |  |  |  |  |
﻿Cash | $ | 4,500 |  | $ | — |  | $ | — |  | $ | 4,500
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ The following table summarizes the contractual maturities of our cash equivalents and available-for-sale investments, excluding money market funds, as of September 30, 2017: ﻿ ﻿ ﻿ ﻿ ﻿
﻿ |  |
﻿ |  |
﻿(in thousands) | Fair Value
﻿Due in one year or less | $ | 61,682
﻿Due after one year through 5 years |  | —
﻿Total investments in debt securities | $ | 61,682
﻿ Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations without call or prepayment penalties.

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- Definition The entire disclosure of the components of cash, cash equivalents, and short-term investments. Short-term investments may include current marketable securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 + Details
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