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Cash Flow Information
 12 Months Ended
May 02, 2020
Supplemental Cash Flow Information [Abstract]  
Cash Flow Information
Note 16. Cash Flow Information

The changes in operating assets and liabilities consisted of the following:
 
Year Ended
 
May 2,
2020
 
April 27,
2019
 
April 28,
2018
(Increase) decrease:
 
 
 
 
 
Account receivable
$
(7,461
)
 
$
10,856

 
$
2,266

Long-term receivables
(1,173
)
 
329

 
1,548

Inventories
(8,347
)
 
(4,076
)
 
(8,517
)
Contract assets
(1,931
)
 
(3,040
)
 
5,911

Prepaid expenses and other current assets
(1,403
)
 
472

 
(1,252
)
Income taxes receivables
533

 
4,250

 
(4,747
)
Investment in affiliates and other assets
(3,137
)
 
48

 
413

Increase (decrease):
 

 
 

 
 

Accounts payable
2,377

 
(2,747
)
 
(2,573
)
Contract liabilities
4,548

 
10,774

 
3,480

Accrued expenses
6,745

 
4,631

 
3,472

Warranty obligations
273

 
(4,393
)
 
346

Long-term warranty obligations
883

 
(1,079
)
 
1,729

Income taxes payable
390

 
(3,023
)
 
(592
)
Long-term marketing obligations and other payables
(387
)
 
(1,116
)
 
379

 
$
(8,090
)
 
$
11,886

 
$
1,863



Supplemental disclosures of cash flow information consisted of the following:
 
Year Ended
 
May 2,
2020
 
April 27,
2019
 
April 28,
2018
Cash payments for:
 
 
 
 
 
Interest
$
46

 
$
177

 
$
193

Income taxes, net of refunds
977

 
(1,934
)
 
8,937



Supplemental schedule of non-cash investing and financing activities consisted of the following:
 
 
Year Ended
 
 
May 2,
2020
 
April 27,
2019
 
April 28,
2018
Demonstration equipment transferred to inventory
 
$
10

 
$
97

 
$
72

Purchases of property and equipment included in accounts payable
 
1,951

 
1,106

 
1,983

Contributions of common stock under the ESPP
 
2,311

 
1,650

 
1,682