Stockholders' Equity	12 Months Ended
Dec. 31, 2018
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity	Stockholders’ Equity Dividends We did not pay any dividends in 2018 and 2017. Share Repurchase Under the stock repurchase program publicly announced in August of 2014, our Board provided authorization to spend up to $20.0 million to repurchase shares of our outstanding common stock. During 2018 and 2017, no shares of our common stock were purchased. We had $11.4 million remaining under the current authorization as of December 31, 2018. From 1997 through December 2018, we have paid more than $1.2 billion to repurchase 6.8 million shares under this program and previously announced programs. Awardees of stock-based compensation may elect to have shares of common stock withheld from vested awards to meet tax obligations. These shares are returned to our treasury stock at the time of vesting. During 2018, we received 3,541 shares of our common stock, with an estimated market value of $0.03 million, from such arrangements. Series A Convertible Preferred Stock Harte Hanks is authorized to issue one million shares of preferred stock with a par value of $1.00. In January 2018, our board of directors designated a total of 9,926 shares of our preferred stock as our Series A Convertible Preferred Stock (the "Series A Preferred Stock"). Each share of our Series A Preferred stock is convertible at any time at the option of the holder into the number of shares of common stock at the initial conversion price. Dividends on the Series A Preferred Stock are accrued 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%. If Series A Preferred Stock is converted into the common stock, the accumulated dividends accrued is no longer payable. Holders of Series A Preferred Stock do not have voting rights, subject to certain exceptions. On January 23, 2018, we issued 9,926 shares of our Series A Preferred Stock to Wipro, LLC for gross proceeds of $9.9 million. Shares are convertible into 16.0% of our outstanding common stock on a pre-closing basis, priced at $9.91 per share of common stock. For so long as Wipro owns at least a majority of the preferred shares originally purchased or is the beneficial owner of at least 5% of the company's common stock, Wipro has the right to appoint one individual as a non-voting observer to the Board and under certain circumstances Wipro may appoint a board member to the board of directors. As of December 31, 2018, Wipro, LLC has designated an observer to the Board of Directors.

Stockholders’ Equity

Dividends

We did not pay any dividends in 2018 and 2017.

Share Repurchase

Under the stock repurchase program publicly announced in August of 2014, our Board provided authorization to spend up to $20.0 million to repurchase shares of our outstanding common stock. During 2018 and 2017, no shares of our common stock were purchased. We had $11.4 million remaining under the current authorization as of December 31, 2018. From 1997 through December 2018, we have paid more than $1.2 billion to repurchase 6.8 million shares under this program and previously announced programs.

Awardees of stock-based compensation may elect to have shares of common stock withheld from vested awards to meet tax obligations. These shares are returned to our treasury stock at the time of vesting. During 2018, we received 3,541 shares of our common stock, with an estimated market value of $0.03 million, from such arrangements.

Series A Convertible Preferred Stock

Harte Hanks is authorized to issue one million shares of preferred stock with a par value of $1.00. In January 2018, our board of directors designated a total of 9,926 shares of our preferred stock as our Series A Convertible Preferred Stock (the "Series A Preferred Stock"). Each share of our Series A Preferred stock is convertible at any time at the option of the holder into the number of shares of common stock at the initial conversion price. Dividends on the Series A Preferred Stock are accrued 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%. If Series A Preferred Stock is converted into the common stock, the accumulated dividends accrued is no longer payable. Holders of Series A Preferred Stock do not have voting rights, subject to certain exceptions.

On January 23, 2018, we issued 9,926 shares of our Series A Preferred Stock to Wipro, LLC for gross proceeds of $9.9 million. Shares are convertible into 16.0% of our outstanding common stock on a pre-closing basis, priced at $9.91 per share of common stock. For so long as Wipro owns at least a majority of the preferred shares originally purchased or is the beneficial owner of at least 5% of the company's common stock, Wipro has the right to appoint one individual as a non-voting observer to the Board and under certain circumstances Wipro may appoint a board member to the board of directors. As of December 31, 2018, Wipro, LLC has designated an observer to the Board of Directors.