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Acquisitions (Details Textual) |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 01, 2016 USD ($) shares | Mar. 31, 2017 USD ($) | Mar. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) | Sep. 30, 2016 USD ($) | Apr. 01, 2016
Business Acquisition [Line Items] |  |  |  |  |  |
Adjustments to deferred acquisition consideration included in share-based compensation |  | $ 3,268 | $ 2,906 |  |  |
Number of Businesses Acquired |  | 0 |  |  |  |
Business Acquisition, Pro Forma Net Income (Loss) |  | $ (10,566,000) | (23,632,000) |  |  |
Redeemable Noncontrolling Interest, Equity, Fair Value |  | $ 60,383,000 |  | $ 60,180,000 |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 100.00% |  |  |  |
Business Combination, Contingent Consideration, Liability |  | $ 235,370,000 |  | 229,564,000 |  |
Forsman & Bodenfors AB [Domain] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles | $ 36,698 |  |  |  |  |
Goodwill, Acquired During Period | $ 24,778 |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 10 years 9 months |  |  |  |  |
Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value | $ 2,275 |  |  |  |  |
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value | 5,514 |  |  |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 0 |  |  |  |  |
Deferred Taxes, Business Combination, Valuation Allowance, Available to Reduce Intangible Assets | $ 8,074 |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% |  |  |  |  |
Business Combination, Consideration Transferred | $ 49,837 |  |  |  |  |
Business Combination, Contingent Consideration, Liability | 15,618 |  |  |  | $ 18,857 |
Luntz Global Partners L L C |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 40.00%
Aggregate 2016 Step Up Transactions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  |  | 1,581 |  |
Business Combination, Acquisition of Less than 100 Percent, Redeemable Noncontrolling Interest, Fair Value |  |  |  | 1,005 |  |
Business Combinations, Assets Relinquished by Acquirer |  |  |  | 428 |  |
Business Combinations, Liabilities Relinquished Previously due to Acquiree |  |  |  | 94 |  |
Minimum [Member] | Forsman & Bodenfors AB [Domain] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Consideration Transferred | 35,000 |  |  |  |  |
Maximum [Member] | Forsman & Bodenfors AB [Domain] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Consideration Transferred | $ 55,000 |  |  |  |  |
Noncontrolling Interest [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Acquisition, Pro Forma Net Income (Loss) |  | 0 |  |  |  |
Additional Paid-in Capital [Member] | Aggregate 2016 Step Up Transactions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  |  |  | 22,775 |  |
Contingent payment [Domain] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability |  | 11,431,000 | $ 6,327,000 |  |  |
Contingent payment [Domain] | Aggregate 2016 Step Up Transactions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Deferred Stock-based Compensation, Discounted |  |  |  | 2,393 |  |
Business Combination, Consideration Transferred |  |  |  | 4,052,000 |  |
Fixed payments [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability |  | $ 4,300,000 |  | 4,810,000 |  |
Fixed payments [Member] | Aggregate 2016 Step Up Transactions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Business Combination, Consideration Transferred |  |  |  | 467 |  |
Noncontrolling Interest Equity [Domain] | Aggregate 2016 Step Up Transactions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests |  |  |  | $ 19,354 |  |
Common Class A [Member] | Common Stock [Member] | Forsman & Bodenfors AB [Domain] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Stock Issued During Period, Shares, Acquisitions | shares | 1,900,000 |  |  |  |  |
Stock Issued During Period, Value, Acquisitions | $ 34,219,000 |  |  |  |  |

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