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Cash paid at closing Payments to Acquire Businesses, Gross Professional Services [Member] Represents information regarding professional services. Nurse Grid [Member] Represents information regarding Nurse Grid. Product Development [Member] Represents information included in the Product Development line item. Non-cash additions to non-marketable equity investments Non-cash additions to non-marketable equity method investments during the period. us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax Unrealized Losses hstm_SalesCommissionsAmortizationTerm Sales Commissions, Amortization Term (Year) Represents the minimum amortization period for non-commensurate commissions. This minimum amortization period is the technological obsolescence period. 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