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Fair Value Measurements (Details Textual) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Deferred acquisition consideration settled through issuance of shares | $ 27,852,000 |  |
Business Combination, Contingent Consideration, Liability | 169,680,000 |  | $ 229,564,000
Fixed payments [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Business Combination, Contingent Consideration, Liability | 10,180,000 |  | $ 4,810,000
Common Stock [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Deferred acquisition consideration settled through issuance of shares | $ 28,727,000 |  |
Stock Issued During Period, Shares, New Issues | 3,353,939 |  | 691,559
Common Stock [Member] | Common Class A [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Deferred acquisition consideration settled through issuance of shares |  | $ 5,585,000 | $ 10,458,000
Share Capital To Be Issued [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Stock Authorized During Period, Value, To be Issued | $ (2,360,000) |  | $ 2,360,000
Stock Authorized During Period, Shares, To be Issued | 100,000 |  | 100,000
Aggregate 2016 Step Up Transactions [Member] | Contingent payment [Domain] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Business Combination, Consideration Transferred |  |  | $ 4,052,000
Aggregate 2016 Step Up Transactions [Member] | Fixed payments [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Business Combination, Consideration Transferred |  |  | $ 467

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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