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Valuation and Qualifying Accounts
 12 Months Ended
May 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
VALUATION AND QUALIFYING ACCOUNTS
 
SCHEDULE II -VALUATION AND QUALIFYING  ACCOUNTS
 
(in thousands)
Column A
Column B
 
Column C
 
Column D
 
Column E
Description
Balance at
Beginning
of Year
 
Additions -
Charged  to
costs and
expenses
 
Deductions
 
Balance at
End of Period
Year Ended May 31, 2016
 
 
 
 
 
 
 
Allowance for deferred tax asset
$
1,791

 
$
40,685

 
$
(267
)
 
$
42,209

Allowance for sales returns and doubtful accounts
$
3,043

 
$
3,748

 
$
(2,419
)
 
$
4,372

Year Ended May 31, 2017
 
 
 
 
 
 
 
Allowance for deferred tax asset
$
42,209

 
$
6,139

 
$
—

 
$
48,348

Allowance for sales returns and doubtful accounts
$
4,372

 
$
(291
)
 
$
(1,136
)
 
$
2,945

Year Ended May 31, 2018
 
 
 
 
 
 
 
Allowance for deferred tax asset
$
48,348

 
$
—

 
$
(21,741
)
 
$
26,607

Allowance for sales returns and doubtful accounts
$
2,945

 
$
608

 
$
(1,087
)
 
$
2,466