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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 9 Months Ended
Jan. 27, 2019
Jan. 28, 2018
Cash flows from operating activities:    
Net income $ 6,969 $ 8,211
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 6,087 5,679
Amortization 592 248
Stock-based compensation 373 2,422
Deferred income taxes (1,691) (3,020)
Realized loss on sale of short-term investments (Available for Sale) 94  
Gain on sale of property, plant, and equipment (1,456)  
Loss from investment in unconsolidated joint venture 109 249
Foreign currency exchange loss 12 133
Changes in assets and liabilities, net of effects of acquisition of businesses    
Accounts receivable (38) (923)
Inventories (658) (3,275)
Other current assets (43) (27)
Other assets 6 (37)
Accounts payable-trade 486 1,715
Deferred revenue (317)  
Accrued expenses and deferred compensation (1,513) (1,608)
Accrued restructuring costs 228  
Income taxes (1,155) 11,702
Net cash provided by operating activities 8,085 21,469
Cash flows from investing activities    
Net cash paid for acquisition of businesses (12,096)  
Capital expenditures (2,954) (6,657)
Proceeds from the sale of property, plant, and equipment 1,894 6
Investment in unconsolidated joint venture (120) (661)
Proceeds from the sale of short-term investments (Held to Maturity) 17,150  
Proceeds from the sale of short-term investments (Available for Sale) 2,458  
Purchase of short-term investments (Available for Sale) (10) (37)
Proceeds from the sale of long-term investments (Rabbi Trust) 1,233 57
Purchase of long-term investments (Rabbi Trust) (795) (1,699)
Premium payment on life insurance policy 0 (18)
Net cash provided by (used in) investing activities 6,760 (9,009)
Cash flows from financing activities:    
Proceeds from line of credit 12,000 10,000
Payments on line of credit (12,000) (10,000)
Payments on vendor-financed capital expenditures (1,412) (3,750)
Dividends paid (3,493) (5,722)
Common stock surrendered for withholding taxes payable (1,303) (1,530)
Common stock repurchased (3,316)  
Payments of debt issuance costs (50)  
Proceeds from common stock issued 0 111
Net cash used in financing activities (9,574) (10,891)
Effect of exchange rate changes on cash and cash equivalents (81) 64
Increase in cash and cash equivalents 5,190 1,633
Cash and cash equivalents at beginning of period 21,228 20,795
Cash and cash equivalents at end of period $ 26,418 $ 22,428