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Cash And Cash Equivalents And Marketable Securities | 12 Months Ended
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Dec. 31, 2016
Cash And Cash Equivalents And Marketable Securities [Abstract] |
Cash And Cash Equivalents And Marketable Securities | 4. Cash and Cash Equivalents and Marketable Securities ﻿ Cash, cash equivalents and marketable securities held as available-for-sale consisted of the following (in thousands): ﻿
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﻿ | Cash, Cash Equivalents and Marketable Securities
﻿ | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value |  | Accrued Interest |  | Total Value
﻿December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash | $ | 1,434 |  | $ | — |  | $ | — |  | $ | 1,434 |  | $ | — |  | $ | 1,434
﻿Cash equivalents |  | 12,783 |  |  | — |  |  | — |  |  | 12,783 |  |  | — |  |  | 12,783
﻿Commercial paper |  | 4,497 |  |  | — |  |  | — |  |  | 4,497 |  |  | — |  |  | 4,497
﻿Corporate securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
﻿ | $ | 18,714 |  | $ | — |  | $ | — |  | $ | 18,714 |  | $ | — |  | $ | 18,714
﻿Reported as: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents | $ | 16,615 |  |  | — |  |  | — |  | $ | 16,615 |  | $ | — |  | $ | 16,615
﻿Marketable securities |  | 2,099 |  |  | — |  |  | — |  |  | 2,099 |  |  | — |  |  | 2,099
﻿ | $ | 18,714 |  | $ | — |  | $ | — |  | $ | 18,714 |  | $ | — |  | $ | 18,714
﻿Maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Matures in one year or less | $ | 18,714 |  | $ | — |  | $ | — |  | $ | 18,714 |  | $ | — |  | $ | 18,714
﻿Matures one to three years |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
﻿ | $ | 18,714 |  | $ | — |  | $ | — |  | $ | 18,714 |  | $ | — |  | $ | 18,714
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﻿December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash | $ | 273 |  | $ | — |  | $ | — |  | $ | 273 |  | $ | — |  | $ | 273
﻿Cash equivalents |  | 22,630 |  |  | — |  |  | — |  |  | 22,630 |  |  | — |  |  | 22,630
﻿Commercial paper |  | 8,396 |  |  | 1 |  |  | (1) |  |  | 8,396 |  |  | — |  |  | 8,396
﻿ | $ | 31,299 |  | $ | 1 |  | $ | (1) |  | $ | 31,299 |  | $ | — |  | $ | 31,299
﻿Reported as: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents | $ | 31,299 |  | $ | 1 |  | $ | (1) |  | $ | 31,299 |  | $ | — |  | $ | 31,299
﻿Marketable securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
﻿ | $ | 31,299 |  | $ | 1 |  | $ | (1) |  | $ | 31,299 |  | $ | — |  | $ | 31,299
﻿Maturities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Matures in one year or less | $ | 31,299 |  | $ | 1 |  | $ | (1) |  | $ | 31,299 |  | $ | — |  | $ | 31,299
﻿Matures one to three years |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | —
﻿ | $ | 31,299 |  | $ | 1 |  | $ | (1) |  | $ | 31,299 |  | $ | — |  | $ | 31,299
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To date we have not recorded any impairment charges on marketable securities related to other-than-temporary declines in market value. ﻿ Our assets measured at fair value were (in thousands): ﻿
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﻿ | Level 1 |  | Level 2 |  | Level 3 |  | Total
﻿December 31, 2016 |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents | $ | 14,217 |  | $ | — |  | $ | — |  | $ | 14,217
﻿Commercial paper |  | — |  |  | 4,497 |  |  | — |  |  | 4,497
﻿ | $ | 14,217 |  | $ | 4,497 |  | $ | — |  | $ | 18,714
﻿December 31, 2015 |  |  |  |  |  |  |  |  |  |  |
﻿Cash and cash equivalents | $ | 22,903 |  | $ | — |  | $ | — |  | $ | 22,903
﻿Commercial paper |  | — |  |  | 8,396 |  |  | — |  |  | 8,396
﻿ | $ | 22,903 |  | $ | 8,396 |  | $ | — |  | $ | 31,299
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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References No definition available. + Details
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