XML 49 R36.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Note 4 - Balance Sheet Details - Available-for-sale Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Available-for-sale securities, amortized cost | $ 300,622 | $ 27,806
Available-for-sale securities, gross unrealized gains | 5 |
Available-for-sale securities, gross unrealized losses | (92) | (10)
Available-for-sale securities, current | 300,535 | 27,796
US Treasury Securities [Member] |  |
Available-for-sale securities, amortized cost | 59,747 |
Available-for-sale securities, gross unrealized gains |  |
Available-for-sale securities, gross unrealized losses | (6) |
Available-for-sale securities, current | 59,741 |
Debt Security, Corporate, US [Member] |  |
Available-for-sale securities, amortized cost | 59,164 | 13,003
Available-for-sale securities, gross unrealized gains |  |
Available-for-sale securities, gross unrealized losses | (77) | (10)
Available-for-sale securities, current | 59,087 | 12,993
United States Commercial Paper [Member] |  |
Available-for-sale securities, amortized cost | 52,800 | 4,929
Available-for-sale securities, gross unrealized losses |  |
Available-for-sale securities, current | 52,800 | 4,929
Debt Security, Corporate, Non-US [Member] |  |
Available-for-sale securities, amortized cost | 5,041 |
Available-for-sale securities, gross unrealized gains | 5 |
Available-for-sale securities, gross unrealized losses |  |
Available-for-sale securities, current | 5,046 |
Foreign Commercial Paper [Member] |  |
Available-for-sale securities, amortized cost | 123,870 | 9,874
Available-for-sale securities, gross unrealized losses | (9) |
Available-for-sale securities, current | $ 123,861 | $ 9,874

X
- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. + References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_DomesticCorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=hrtx_UnitedStatesCommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignCorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=hrtx_ForeignCommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |