Subsequent Events Subsequent Events (Notes)	12 Months Ended
Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events [Text Block]	23. Subsequent Events On March 14, 2019 (the “Issue Date”), the Company entered into a securities purchase agreement with Stagwell Holdings, an affiliate of Stagwell, pursuant to which Stagwell Holdings agreed to purchase, (i) 14,285,714 newly authorized Class A shares for $3.50 per share for an aggregate purchase price of $50 million and (ii) 50,000 newly authorized Series 6 convertible preference shares (“Series 6 Preference Shares”) for an aggregate purchase price of $50 million. The holders of the Series 6 Preference Shares have the right to convert their Series 6 Preference Shares in whole at any time and from time to time, and in part at any time and from time to time after 1.00 year following the original issuance date of the Preference Shares, into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation per share preference of each Series 6 Preference Share is $1,000. The initial Conversion Price is $5.00 per Preference Share, subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities. The Series 6 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Issue Date. Holders of the Series 6 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 6 Preference Shares. The Series 6 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion Price or (ii) after the fifth anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price. Following certain change in control transactions of the Company in which holders of Series 6 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 6 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value. Subject to certain limitations, the Series 6 Preference Shares are not convertible into Class A Shares to the extent upon conversion the holder will beneficially hold more than 19.9% of the Company’s outstanding common shares or voting power. In the event that such restrictions would prevent the conversion of any Series 6 Preference Shares, such Series 6 Preference Shares will be converted into a separate newly authorized series of convertible preference shares of the Company, the Series 7 convertible preference shares (the “Alternative Preference Shares”), at the same conversion rate at which the Series 6 Preference Shares would convert into Class A Shares. The Alternative Preference Shares, in turn, are convertible into Class A Shares on a One-to-one basis, subject to certain conversion rate adjustments. Series 6 Preference Shares or Alternative Preference Shares will not entitle their holders to vote in the election of directors and, other than as required by applicable law, holders of the Series 6 Preference Shares will not have voting rights.

23. Subsequent Events

On March 14, 2019 (the “Issue Date”), the Company entered into a securities purchase agreement with Stagwell Holdings, an affiliate of Stagwell, pursuant to which Stagwell Holdings agreed to purchase, (i) 14,285,714 newly authorized Class A shares for $3.50 per share for an aggregate purchase price of $50 million and (ii) 50,000 newly authorized Series 6 convertible preference shares (“Series 6 Preference Shares”) for an aggregate purchase price of $50 million.

The holders of the Series 6 Preference Shares have the right to convert their Series 6 Preference Shares in whole at any time and from time to time, and in part at any time and from time to time after 1.00 year following the original issuance date of the Preference Shares, into a number of Class A Shares equal to the then-applicable liquidation preference divided by the applicable conversion price at such time (the “Conversion Price”). The initial liquidation per share preference of each Series 6 Preference Share is $1,000. The initial Conversion Price is $5.00 per Preference Share, subject to customary adjustments for share splits and combinations, dividends, recapitalizations and other matters, including weighted average anti-dilution protection for certain issuances of equity or equity-linked securities.

The Series 6 Preference Shares’ liquidation preference accretes at 8.0% per annum, compounded quarterly until the five-year anniversary of the Issue Date.

Holders of the Series 6 Preference Shares are entitled to dividends in an amount equal to any dividends that would otherwise have been payable on the Class A Shares issued upon conversion of the Series 6 Preference Shares. The Series 6 Preference Shares are convertible at the Company’s option (i) on and after the two-year anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least 125% of the Conversion Price or (ii) after the fifth anniversary of the Issue Date, if the closing trading price of the Class A Shares over a specified period prior to conversion is at least equal to the Conversion Price.

Following certain change in control transactions of the Company in which holders of Series 6 Preference Shares are not entitled to receive cash or qualifying listed securities with a value at least equal to the liquidation preference plus accrued and unpaid dividends, (i) holders will be entitled to cash dividends on the liquidation preference at an increasing rate (beginning at 7%), and (ii) the Company will have a right to redeem the Series 6 Preference Shares for cash at the greater of their liquidation preference plus accrued and unpaid dividends or their as-converted value.

Subject to certain limitations, the Series 6 Preference Shares are not convertible into Class A Shares to the extent upon conversion the holder will beneficially hold more than 19.9% of the Company’s outstanding common shares or voting power. In the event that such restrictions would prevent the conversion of any Series 6 Preference Shares, such Series 6 Preference Shares will be converted into a separate newly authorized series of convertible preference shares of the Company, the Series 7 convertible preference shares (the “Alternative Preference Shares”), at the same conversion rate at which the Series 6 Preference Shares would convert into Class A Shares. The Alternative Preference Shares, in turn, are convertible into Class A Shares on a One-to-one basis, subject to certain conversion rate adjustments.

Series 6 Preference Shares or Alternative Preference Shares will not entitle their holders to vote in the election of directors and, other than as required by applicable law, holders of the Series 6 Preference Shares will not have voting rights.