XML 37 R24.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fair Value of Financial Instruments (Tables) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | 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):
|  | September 30, 2017 |
|  |  |  | Unrealized |  | Unrealized |  | Fair |
|  | Cost |  | Gains |  | Losses |  | Value |
Cash and cash equivalents |  | $ | 2,784 |  | $ | — |  | $ | — |  | $ | 2,784 |
|  | 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 |
| 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 September 30, 2017 and December 31, 2016 (in thousands):
|  | September 30, 2017 |
|  | Fair Value |  | Level 1 |  | Level 2 |  | Level 3 |
Money market funds |  | $ | 620 |  | $ | 620 |  | $ | — |  | $ | — |
|  | 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 |  | $ | — |
| 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 |

X
- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: 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=66048111&loc=d3e19190-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringAndNonrecurringBasisTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- 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
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_SummaryInvestmentHoldingsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration