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Earnings Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Numerator [Abstract]    
Net loss - numerator for basic loss per share $ (2,913)us-gaap_NetIncomeLoss $ (9,596)us-gaap_NetIncomeLoss
Denominator [Abstract]    
Shares used for basic loss per share (in shares) 35,595us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 35,151us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Shares used for diluted loss per share (in shares) 35,595us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding [1] 35,151us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding [1]
Loss per share [Abstract]    
Basic (in dollars per share) $ (0.08)us-gaap_EarningsPerShareBasic $ (0.27)us-gaap_EarningsPerShareBasic
Diluted (in dollars per share) $ (0.08)us-gaap_EarningsPerShareDiluted [1] $ (0.27)us-gaap_EarningsPerShareDiluted [1]
Non-Qualified Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 1,243us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 2,571us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 404us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember		 332us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockUnitsRSUMember
Performance-based Stock Units    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 98us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_PerformanceSharesMember		 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_PerformanceSharesMember
Warrants Related to Cash Convertible Notes [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 7,707us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= hway_HwayWarrantsRelatedToCashConvertibleNotesMember		 7,707us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= hway_HwayWarrantsRelatedToCashConvertibleNotesMember
CareFirst Convertible Note [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 892us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= hway_CarefirstConvertibleNoteMember		 892us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= hway_CarefirstConvertibleNoteMember
CareFirst Warrants    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Dilutive securities outstanding not included in the computation of loss per share because their effect is antidilutive (in shares) 36us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantMember		 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_WarrantMember
Non-Qualified Stock Options [Member]    
Denominator [Abstract]    
Effect of dilutive stock options and restricted stock units outstanding (in shares) 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember		 [1]
Restricted Stock Units [Member]    
Denominator [Abstract]    
Effect of dilutive stock options and restricted stock units outstanding (in shares) 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember		 [1]
Performance Shares [Member]    
Denominator [Abstract]    
Effect of dilutive stock options and restricted stock units outstanding (in shares) 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		 [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember		 [1]
CareFirst Warrants    
Denominator [Abstract]    
Effect of dilutive stock options and restricted stock units outstanding (in shares) 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember		 [1] 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember		 [1]
[1] The assumed exercise of stock-based awards for the three months ended March 31, 2015 and 2014 was not considered because the impact would be anti-dilutive.