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Goodwill
6 Months Ended
Oct. 30, 2021
Goodwill.  
Goodwill

9. Goodwill

The following table presents the changes in the Company’s goodwill balance (in thousands):

Small UAS

TMS

MUAS

All other

Total

Balance at April 30, 2021

$

6,340

$

$

288,611

$

19,254

$

314,205

Additions to goodwill

1,395

20,288

21,683

Impairment of goodwill

Balance at October 30, 2021

$

6,340

$

-

$

290,006

$

39,542

$

335,888

The goodwill balance at April 30, 2021 is attributable to the acquisitions of Pulse, ISG, and Arcturus acquisitions. The MUAS addition to goodwill relates to measurement period adjustments for pre-acquisition tax returns. The addition to All other goodwill is attributable to the Telerob acquisition. Refer to Note 18—Business Acquisitions for further details.