Acquisitions	9 Months Ended
Sep. 30, 2017
Business Combinations [Abstract]
Acquisitions	Acquisitions On October 1, 2015, the Company acquired Co Company, a UK-based management consulting firm that specializes in organizational development. The former owners of Co Company were eligible to receive additional cash consideration upon the realization of specific revenue and EBITDA Margin milestones achieved over the period October 2015 through December 2018. On August 25, 2016, the Company and the former owners of Co Company entered into a Deed of Amendment (the "Amendment") to the Share Purchase Agreement dated October 1, 2015. The Amendment adjusted the target fee revenue and targeted EBITDA margin for each remaining earn out period taking into consideration the unanticipated acquisitions completed subsequent to the Share Purchase Agreement. The new targets include subsequent acquisitions and took effect retrospectively from January 1, 2016. On June 14, 2017, the Company and the former owners of Co Company entered into an Earn Out Buyout Agreement (the “Buyout Agreement”) in accordance with the terms and conditions of the Share Purchase Agreement dated October 1, 2015, as amended by a Deed of Amendment dated August 25, 2016. Pursuant to the Buyout Agreement, in accordance with the Share Purchase Agreement and Deed of Amendment, the Company exercised its right to buy out all of the remaining earnout amounts. The price paid to buy out the Remaining Earn Out Amounts was calculated in accordance with the formula set forth in the Purchase Agreement and resulted in an aggregate buyout payment to the former owners of Co Company of $2.3 million during the three months ended June 30, 2017. On September 1, 2016, the Company acquired substantially all of the assets of Philosophy IB, LLP ("Philosophy IB"), a New Jersey-based leadership, organization development and management consulting firm for $6.0 million, which was funded from existing cash. The former owners of Philosophy IB are eligible to receive an additional cash consideration based on two components: achieving revenue milestones generated from its software products from September 2016 through August 2019 and percentage of consulting revenue achieved over the period September 2016 to August 2019, subject to a profitability test. During the three months ended September 30, 2017, the Company determined that the software and consulting revenue targets for the period from September 2016 to August 2017, or first installment, would not be achieved. As such, the Company reduced the first installment earnout accrual by $0.7 million.

Acquisitions

9 Months Ended

Sep. 30, 2017

On October 1, 2015, the Company acquired Co Company, a UK-based management consulting firm that specializes in organizational development. The former owners of Co Company were eligible to receive additional cash consideration upon the realization of specific revenue and EBITDA Margin milestones achieved over the period October 2015 through December 2018. On August 25, 2016, the Company and the former owners of Co Company entered into a Deed of Amendment (the "Amendment") to the Share Purchase Agreement dated October 1, 2015. The Amendment adjusted the target fee revenue and targeted EBITDA margin for each remaining earn out period taking into consideration the unanticipated acquisitions completed subsequent to the Share Purchase Agreement. The new targets include subsequent acquisitions and took effect retrospectively from January 1, 2016. On June 14, 2017, the Company and the former owners of Co Company entered into an Earn Out Buyout Agreement (the “Buyout Agreement”) in accordance with the terms and conditions of the Share Purchase Agreement dated October 1, 2015, as amended by a Deed of Amendment dated August 25, 2016. Pursuant to the Buyout Agreement, in accordance with the Share Purchase Agreement and Deed of Amendment, the Company exercised its right to buy out all of the remaining earnout amounts. The price paid to buy out the Remaining Earn Out Amounts was calculated in accordance with the formula set forth in the Purchase Agreement and resulted in an aggregate buyout payment to the former owners of Co Company of $2.3 million during the three months ended June 30, 2017.

On September 1, 2016, the Company acquired substantially all of the assets of Philosophy IB, LLP ("Philosophy IB"), a New Jersey-based leadership, organization development and management consulting firm for $6.0 million, which was funded from existing cash. The former owners of Philosophy IB are eligible to receive an additional cash consideration based on two components: achieving revenue milestones generated from its software products from September 2016 through August 2019 and percentage of consulting revenue achieved over the period September 2016 to August 2019, subject to a profitability test. During the three months ended September 30, 2017, the Company determined that the software and consulting revenue targets for the period from September 2016 to August 2017, or first installment, would not be achieved. As such, the Company reduced the first installment earnout accrual by $0.7 million.