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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 6 Months Ended
Oct. 31, 2021
Nov. 01, 2020
Cash flows from operating activities:    
Net income (loss) $ 3,101,000 $ (349,000)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:    
Depreciation 3,471,000 3,538,000
Amortization 267,000 235,000
Stock-based compensation 709,000 474,000
Deferred income taxes (319,000) 4,419,000
Realized (gain) loss from the sale of short-term investments (Available for Sale) (4,000) 6,000
Income from investment in unconsolidated joint venture   (167,000)
Foreign currency exchange loss 170,000 723,000
Changes in assets and liabilities:    
Accounts receivable 5,441,000 (7,663,000)
Inventories (7,750,000) 602,000
Other current assets 39,000 (1,175,000)
Other assets (987,000) (40,000)
Accounts payable – trade (2,269,000) 14,156,000
Deferred revenue 139,000 (127,000)
Accrued expenses and deferred compensation (2,908,000) 6,019,000
Income taxes (428,000) 2,052,000
Net cash (used in) provided by operating activities (1,328,000) 22,703,000
Cash flows from investing activities:    
Capital expenditures (3,901,000) (2,041,000)
Proceeds from the sale of equipment   12,000
Investment in unconsolidated joint venture   (90,000)
Proceeds from the maturity of short-term investments (Held to Maturity) 3,200,000 1,800,000
Purchase of short-term and long-term investments (Held to Maturity) (8,876,000) (1,245,000)
Purchase of short-term investments (Available for Sale) (4,371,000) (5,010,000)
Proceeds from the sale of short-term investments (Available for Sale) 306,000 455,000
Proceeds from the sale of long-term investments (rabbi trust)   77,000
Purchase of long-term investments (rabbi trust) (580,000) (257,000)
Net cash used in investing activities (14,222,000) (6,299,000)
Cash flows from financing activities:    
Payments associated with lines of credit   (30,772,000)
Payment associated with Paycheck Protection Program Loan   (7,606,000)
Dividends paid (2,699,000) (2,583,000)
Common stock repurchased (1,752,000)  
Common stock surrendered for withholding taxes payable (50,000) (25,000)
Payments of debt issuance costs   (15,000)
Net cash used in financing activities (4,501,000) (41,001,000)
Effect of exchange rate changes on cash and cash equivalents (2,000) 95,000
Decrease in cash and cash equivalents (20,053,000) (24,502,000)
Cash and cash equivalents at beginning of period 37,009,000 69,790,000
Cash and cash equivalents at end of period $ 16,956,000 $ 45,288,000