XML 41 R30.htm IDEA: XBRL DOCUMENT
v3.19.2

Marketable Securities (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2019
Investments, Debt and Equity Securities [Abstract] |
Schedule for Available-for-Sale Securities | The following is a summary of available-for-sale securities as of June 30, 2019 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Corporate debt securities | $ | 43,852 |  |  | $ | 191 |  |  | $ | (17 | ) |  | $ | 44,026 |
Tax-exempt municipal securities | 15,272 |  |  | 129 |  |  | (2 | ) |  | 15,399 |
Variable rate demand notes | 5,600 |  |  | — |  |  | — |  |  | 5,600 |
Total | $ | 64,724 |  |  | $ | 320 |  |  | $ | (19 | ) |  | $ | 65,025 |
The following is a summary of available-for-sale securities as of December 31, 2018 (in thousands):
| Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized (Losses) |  | Estimated Fair Value
Corporate debt securities | $ | 48,202 |  |  | $ | 12 |  |  | $ | (284 | ) |  | $ | 47,930 |
Tax-exempt municipal securities | 22,858 |  |  | 45 |  |  | (34 | ) |  | 22,869 |
Variable rate demand notes | 4,000 |  |  | — |  |  | — |  |  | 4,000 |
Total | $ | 75,060 |  |  | $ | 57 |  |  | $ | (318 | ) |  | $ | 74,799 |
Schedule of Maturities of Marketable Securities | The following table summarizes the maturities of the Company’s marketable securities as of December 31, 2018 and June 30, 2019 (in thousands):
| December 31, 2018 |  | June 30, 2019
Due within one year | $ | 37,121 |  |  | $ | 39,288 |
Due after one year through five years | 37,678 |  |  | 25,737 |
Total | $ | 74,799 |  |  | $ | 65,025 |

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

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration