XML 22 R47.htm IDEA: XBRL DOCUMENT v2.4.1.9

Note 9 - Employee Benefit Plan (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 9 - Employee Benefit Plan (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Defined Contribution Plan, Maximum Annual Contributions by Employer, Per Employee, Amount	$ 7,800hrtx_DefinedContributionPlanMaximumAnnualContributionsByEmployerPerEmployeeAmount	$ 7,650hrtx_DefinedContributionPlanMaximumAnnualContributionsByEmployerPerEmployeeAmount	$ 7,500hrtx_DefinedContributionPlanMaximumAnnualContributionsByEmployerPerEmployeeAmount
Defined Contribution Plan, Cost Recognized	181,000us-gaap_DefinedContributionPlanCostRecognized	134,000us-gaap_DefinedContributionPlanCostRecognized	71,000us-gaap_DefinedContributionPlanCostRecognized
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Maximum [Member]
Note 9 - Employee Benefit Plan (Details) [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_RangeAxis = us-gaap_MaximumMember	3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_RangeAxis = us-gaap_MaximumMember	3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Maximum amount per each participant the employer may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	hrtx_DefinedContributionPlanMaximumAnnualContributionsByEmployerPerEmployeeAmount
Namespace Prefix:	hrtx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	hrtx_Note9EmployeeBenefitPlanDetailsLineItems
Namespace Prefix:	hrtx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: