Basis of Presentation	6 Months Ended
Jun. 30, 2018
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 United States Generally Accepted Accounting Principles ("U.S. 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 six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. The information included in this Quartery Report on 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 fiscal year ended December 31, 2017 (the "2017 10-K"). Reverse Stock Split On January 31, 2018, we executed a 1-for-10 reverse stock split (the "Reverse Stock Split") which became effective for trading purposes on February 1, 2018. Pursuant to the Reverse Stock Split, every 10 pre-split shares of our common stock, par value $1.00 per share ("Common Stock") were exchanged for one post-split share of the Company's common stock. No fractional shares were issued in connection with the Reverse Stock Split. Stockholders who would otherwise have held a fractional share of the Common Stock received (or are entitled to receive) a cash payment in lieu thereof. In addition, our authorized Common Stock was reduced from 250 million to 25 million shares. The number of authorized shares of preferred stock remained unchanged at one million shares. The Condensed Consolidated Financial Statements and Accompanying Notes to Unaudited Condensed Consolidated Financial Statements give retroactive effect to the Reverse Stock Split for all periods presented. The calculation of basic and diluted earnings/(loss) per share have been determined based on a retroactive adjustment of weighted average shares outstanding for all periods presented. To reflect the Reverse Stock Split on stockholders' equity, an amount equal to the par value of the reduced shares from the Common Stock par value account was reclassified to additional paid in capital resulting in no net impact to stockholders' equity on the Condensed Consolidated Balance Sheets. Use of Estimates The preparation of Condensed Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses. Actual results and outcomes could differ from those estimates and assumptions. Such estimates include, but are not limited to, estimates related to pension accounting; fair value for purposes of assessing long-lived assets for impairment; income taxes; stock-based compensation; and contingencies. 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 Condensed Consolidated Statements of Comprehensive Income/(Loss) The “Labor” line in the Condensed Consolidated Statements of Comprehensive Income/(Loss) includes all employee payroll and benefits, including stock-based compensation, along with temporary labor costs. The “Production and distribution” and “Advertising, selling, general and administrative” lines do not include labor, depreciation, or amortization. Securities Purchase Agreement On January 23, 2018, we entered into a Securities Purchase Agreement with Wipro, LLC, pursuant to which on January 30, 2018 we issued 9,926 shares of Series A Convertible Preferred Stock, par value $1.00 per share (the “Series A Preferred Stock”), for aggregate consideration of $9.9 million. Dividends on the Series A Preferred Stock accrue at a rate of 5.0% per year or the rate that cash dividends were paid in respect to shares of Common Stock if such rate is greater than 5.0%. The aggregate shares issued under the Securities Purchase Agreement are convertible into 1,001,614 shares of our Common Stock. Along with customary protective provisions, Wipro, LLC will be able to designate an observer or director to the Board of Directors. We are using the proceeds for general corporate purposes including for working capital purposes. See Note E, Convertible Preferred Stock, for further information. Related Party Transactions Since 2016, Wipro, LLC has provided a variety of technology-related service to the Company, including database and software development, database support and analytics, IT infrastructure support, and digital campaign management. Transactions with Wipro, LLC have been classified and disclosed in the 2017 10-K and in this Quarterly Report on Form 10-Q as related party transactions in accordance with ASC 850, Related Party Disclosures, and in accordance with the SEC's Regulation S-X Rule 4-08(k), as applicable. See Note N, Certain Relationships and Related Party Transactions, for further information.

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 United States Generally Accepted Accounting Principles ("U.S. 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 six months ended June 30, 2018 are not necessarily indicative of the results that may be expected for the year ending December 31, 2018. The information included in this Quartery Report on 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 fiscal year ended December 31, 2017 (the "2017 10-K").

Reverse Stock Split

On January 31, 2018, we executed a 1-for-10 reverse stock split (the "Reverse Stock Split") which became effective for trading purposes on February 1, 2018. Pursuant to the Reverse Stock Split, every 10 pre-split shares of our common stock, par value $1.00 per share ("Common Stock") were exchanged for one post-split share of the Company's common stock. No fractional shares were issued in connection with the Reverse Stock Split. Stockholders who would otherwise have held a fractional share of the Common Stock received (or are entitled to receive) a cash payment in lieu thereof. In addition, our authorized Common Stock was reduced from 250 million to 25 million shares. The number of authorized shares of preferred stock remained unchanged at one million shares.

The Condensed Consolidated Financial Statements and Accompanying Notes to Unaudited Condensed Consolidated Financial Statements give retroactive effect to the Reverse Stock Split for all periods presented. The calculation of basic and diluted earnings/(loss) per share have been determined based on a retroactive adjustment of weighted average shares outstanding for all periods presented. To reflect the Reverse Stock Split on stockholders' equity, an amount equal to the par value of the reduced shares from the Common Stock par value account was reclassified to additional paid in capital resulting in no net impact to stockholders' equity on the Condensed Consolidated Balance Sheets.

Use of Estimates

The preparation of Condensed Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue, and expenses. Actual results and outcomes could differ from those estimates and assumptions. Such estimates include, but are not limited to, estimates related to pension accounting; fair value for purposes of assessing long-lived assets for impairment; income taxes; stock-based compensation; and contingencies. 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 Condensed Consolidated Statements of Comprehensive Income/(Loss)

The “Labor” line in the Condensed Consolidated Statements of Comprehensive Income/(Loss) includes all employee payroll and benefits, including stock-based compensation, along with temporary labor costs. The “Production and distribution” and “Advertising, selling, general and administrative” lines do not include labor, depreciation, or amortization.

Securities Purchase Agreement

On January 23, 2018, we entered into a Securities Purchase Agreement with Wipro, LLC, pursuant to which on January 30, 2018 we issued 9,926 shares of Series A Convertible Preferred Stock, par value $1.00 per share (the “Series A Preferred Stock”), for aggregate consideration of $9.9 million. Dividends on the Series A Preferred Stock accrue at a rate of 5.0% per year or the rate that cash dividends were paid in respect to shares of Common Stock if such rate is greater than 5.0%. The aggregate shares issued under the Securities Purchase Agreement are convertible into 1,001,614 shares of our Common Stock.

Along with customary protective provisions, Wipro, LLC will be able to designate an observer or director to the Board of Directors. We are using the proceeds for general corporate purposes including for working capital purposes.

See Note E, Convertible Preferred Stock, for further information.

Related Party Transactions

Since 2016, Wipro, LLC has provided a variety of technology-related service to the Company, including database and software development, database support and analytics, IT infrastructure support, and digital campaign management. Transactions with Wipro, LLC have been classified and disclosed in the 2017 10-K and in this Quarterly Report on Form 10-Q as related party transactions in accordance with ASC 850, Related Party Disclosures, and in accordance with the SEC's Regulation S-X Rule 4-08(k), as applicable. See Note N, Certain Relationships and Related Party Transactions, for further information.