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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2016
Fair Value of Financial Instruments |
Schedule of estimated fair values of financial instruments outstanding | The estimated fair values of financial instruments outstanding were (in thousands):
|  | December 31, 2016 |
|  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
Cash and cash equivalents |  | $ | 8,766 |  | $ | — |  | $ | — |  | $ | 8,766 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government-sponsored enterprise bonds |  | $ | 762 |  | $ | — |  | $ | — |  | $ | 762 |
Corporate notes |  |  | 240 |  |  | — |  |  | — |  |  | 240 |
Total short-term investments |  | $ | 1,002 |  | $ | — |  | $ | — |  | $ | 1,002 |
|  | December 31, 2015 |
|  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
Cash and cash equivalents |  | $ | 5,640 |  | $ | — |  | $ | — |  | $ | 5,640 |
Short-term investments: |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government-sponsored enterprise bonds |  | $ | 6,243 |  | $ | — |  | $ | — |  | $ | 6,243 |
Municipal bonds |  |  | 200 |  |  | — |  |  | — |  |  | 200 |
Corporate notes |  |  | 8,171 |  |  | — |  |  | (16) |  |  | 8,155 |
Total short-term investments |  | $ | 14,614 |  | $ | — |  | $ | (16) |  | $ | 14,598 |
Schedule of estimated fair values of available-for-sale securities with unrealized losses | The estimated fair values of available-for-sale securities with unrealized losses as of December 31, 2015 were (in thousands):
|  | December 31, 2015 |
|  |  |  |  | Unrealized |  | Fair |
|  | Cost |  | Losses |  | Value |
Short-term investments: |  |  |  |  |  |  |  |  |  |
Corporate notes |  | $ | 8,171 |  | $ | (16) |  | $ | 8,155 |
Total short-term investments |  | $ | 8,171 |  | $ | (16) |  | $ | 8,155 |
Schedule of fair value hierarchy for financial assets (cash equivalents and investments) | The following table represents the Company’s fair value hierarchy for its financial assets (cash equivalents and investments) as of December 31, 2016 and 2015 (in thousands):
|  | December 31, 2016 |
|  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Money market funds |  | $ | 84 |  | $ | 84 |  | $ | — |  | $ | — |
U.S. government-sponsored enterprise bonds |  |  | 3,767 |  |  | — |  |  | 3,767 |  |  | — |
Municipal bonds |  |  | 4,027 |  |  | — |  |  | 4,027 |  |  | — |
Corporate notes |  |  | 480 |  |  | — |  |  | 480 |  |  | — |
Total assets |  | $ | 8,358 |  | $ | 84 |  | $ | 8,274 |  | $ | — |
|  | December 31, 2015 |
|  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Money market funds |  | $ | 2,238 |  | $ | 2,238 |  | $ | — |  | $ | — |
U.S. government-sponsored enterprise bonds |  |  | 7,525 |  |  | — |  |  | 7,525 |  |  | — |
Municipal bonds |  |  | 200 |  |  | — |  |  | 200 |  |  | — |
Corporate notes |  |  | 8,255 |  |  | — |  |  | 8,255 |  |  | — |
Certificates of deposit |  |  | 240 |  |  | — |  |  | 240 |  |  | — |
Total assets |  | $ | 18,458 |  | $ | 2,238 |  | $ | 16,220 |  | $ | — |
Schedule of cost and fair value of investments based on maturity groups | Cost and fair value of investments based on two maturity groups were (in thousands):
|  | December 31, 2016 |
|  |  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
Due within 1 year |  | $ | 1,002 |  | $ | — |  | $ | — |  | $ | 1,002 |
|  | December 31, 2015 |
|  |  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
Due within 1 year |  | $ | 14,614 |  | $ | — |  | $ | (16) |  | $ | 14,598 |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring and/or nonrecurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the summary of investment holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-12C) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010 + Details
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