Annual report pursuant to Section 13 and 15(d)

Intangible Assets (Detail)

v3.7.0.1
Intangible Assets (Detail) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Intangible Assets [Line Items]    
Amortized intangible assets, Gross $ 167,351 $ 167,351
Amortized intangible assets, Accumulated Amortization (56,109) (40,707)
Amortized intangible assets, Net 111,242 126,644
Exchange rate fluctuations 77 383
Total Intangible assets 217,319 233,027
Trademarks    
Intangible Assets [Line Items]    
Amortized intangible assets, Gross 3,986 3,986
Amortized intangible assets, Accumulated Amortization (3,986) (3,986)
Unamortized intangible assets 106,000 106,000
Customer Lists    
Intangible Assets [Line Items]    
Amortized intangible assets, Gross 125,099 125,099
Amortized intangible assets, Accumulated Amortization (31,094) (19,910)
Amortized intangible assets, Net 94,005 105,189
Intellectual Property    
Intangible Assets [Line Items]    
Amortized intangible assets, Gross 33,100 33,100
Amortized intangible assets, Accumulated Amortization (16,994) (13,281)
Amortized intangible assets, Net 16,106 19,819
Database Rights    
Intangible Assets [Line Items]    
Amortized intangible assets, Gross 4,256 4,256
Amortized intangible assets, Accumulated Amortization (3,202) (2,777)
Amortized intangible assets, Net 1,054 1,479
Non-compete Agreements    
Intangible Assets [Line Items]    
Amortized intangible assets, Gross 910 910
Amortized intangible assets, Accumulated Amortization (833) (753)
Amortized intangible assets, Net $ 77 $ 157