Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Consolidation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Harte Hanks, Inc. and subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. As used in this report, the terms “Harte Hanks,” “the company,” “we,” “us,” or “our” may refer to Harte Hanks, Inc., one or more of its consolidated subsidiaries, or all of them taken as a whole. Interim Financial Information The financial statements have been prepared in accordance with U.S. Generally Accepted Accounting Principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended September 30, 2016 are not necessarily indicative of the results that may be expected for the year ending December 31, 2016. The information included in this Form 10-Q should be read in conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2015. Discontinued Operations As discussed in Note M, Discontinued Operations, the operating results of our Trillium Software ("Trillium") reporting unit are classified as held for sale and reported as discontinued operations for all periods presented in the Condensed Consolidated Financial Statements. Unless otherwise stated, amounts related to the Trillium Software operations are excluded from the Notes to Condensed Consolidated Financial Statements for all periods presented. Results of the remaining Harte Hanks business are reported as continuing operations. In the event of a disposal of Trillium, debt under the Secured Credit Facilities is required to be repaid. In accordance with the provisions of ASC 205-20-45-6, Allocation of Interest to Discontinued Operations, we have reclassified interest expense for the Secured Credit Facilities to discontinued operations for all periods presented in the Condensed Consolidated Financial Statements. Reclassifications Certain amounts in the financial statements from the prior years have been reclassified to conform to the current year's presentation. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. Actual results and outcomes could differ from those estimates and assumptions. On an ongoing basis, management reviews its estimates based on currently available information. Changes in facts and circumstances could result in revised estimates and assumptions. Operating Expense Presentation in Consolidated Statements of Comprehensive Loss “Labor” in the Consolidated Statements of Comprehensive Loss includes all employee payroll and benefits, including stock-based compensation, along with temporary labor costs. “Production and distribution” and “Advertising, selling, general and administrative” do not include labor, depreciation, or amortization.