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Restructuring Charges (Tables)
 3 Months Ended
Jul. 31, 2017
Restructuring Charges [Abstract]  
Restructuring Charges
The Company's restructuring activities for the three months ended July 31, 2017 and 2016 are summarized as follows (in thousands):
 
Workforce Reduction
 
Excess Facilities
 
Total
 
 
Balance at April 30, 2016
$
497

 
$
546

 
$
1,043

    Restructuring charges
327

 
—

 
327

    Payments
(341
)
 
(129
)
 
(470
)
Balance at July 31, 2016
$
483

 
$
417

 
$
900

 
 
 
 
 
 
Balance at April 30, 2017
$
1,108

 
$
299

 
$
1,407

    Restructuring charges
40

 
—

 
40

    Payments
(1,148
)
 
(13
)
 
(1,161
)
    Non-cash settlements of restructuring charges
—

 
(24
)
 
(24
)
Balance at July 31, 2017
$
—

 
$
262

 
$
262