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SUBSEQUENT EVENTS (Details) (USD $)
3 Months Ended 1 Months Ended
Mar. 31, 2015
Apr. 30, 2015
May 31, 2015
Dec. 31, 2014
Subsequent Event [Line Items]        
Litigation settlement payable $ 7,000,000us-gaap_LitigationReserveCurrent     $ 7,000,000us-gaap_LitigationReserveCurrent
Stock options to purchase shares of common stock (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross      
Stock options granted, exercisable price (in dollar per share) $ 4.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice      
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Administrative penalty payments   (400,000)us-gaap_LitigationSettlementAmount
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
   
Insurance claim receivable     7,000,000us-gaap_InsuranceSettlementsReceivable
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Litigation settlement payable     7,000,000us-gaap_LitigationReserveCurrent
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
 
Subsequent Event [Member] | John Boylan [Member]        
Subsequent Event [Line Items]        
Annual base salary of chairman, president and chief executive officer     120,000husa_AnnualBaseSalaryOfChairmanPresidentAndChiefExecutiveOfficer
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Stock options to purchase shares of common stock (in shares)     900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Stock options granted, exercisable price (in dollar per share)     $ 0.2158us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Stock options term 10 years      
Percentage of vesting awards on first anniversary (in hundredths)     0.333%husa_PercentageOfVestingAwardsPeriodThree
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Percentage of vesting awards on second anniversary (in hundredths)     0.333%husa_PercentageOfVestingAwardsPeriodFour
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Percentage of vesting awards on third anniversary (in hundredths)     0.333%husa_PercentageOfVestingAwardsPeriodFive
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Minimum aggregate gross proceeds from the sale of equity securities under vesting condition     10,000,000husa_MinimumAggregateGrossProceedsFromTheSaleOfEquitySecuritiesUnderVestingCondition
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Minimum aggregate purchase price of oil and gas properties under vesting condition     10,000,000husa_MinimumAggregatePurchasePriceOfOilAndGasPropertiesUnderVestingCondition
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Stock options grant date value     87,209us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= husa_ChairmanPresidentAndChiefExecutiveOfficerMemberMember
 
Subsequent Event [Member] | Director [Member]        
Subsequent Event [Line Items]        
Stock options to purchase shares of common stock (in shares)     8,333us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Stock options granted, exercisable price (in dollar per share)     $ 0.2158us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Stock options term 10 years      
Percentage of vesting awards on date of grant (in hundredths)     20.00%husa_PercentageOfVestingAwardsPeriodOne
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Percentage of vesting awards on nine months from date of grant (in hundredths)     80.00%husa_PercentageOfVestingAwardsPeriodTwo
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember
 
Stock options grant date value     $ 807us-gaap_StockGrantedDuringPeriodValueSharebasedCompensationGross
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_DirectorMember