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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
3 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Cash flows from operating activities:    
Net income from continuing operations $ 31 $ 830
Net loss from discontinued operations 0 (216)
Net income 31 614
Non-cash charges to earnings 1,151 145
Net changes in operating assets and liabilities (4,743) 1,759
Cash (used in) provided by operating activities – continuing operations (3,561) 2,518
Cash provided by operating activities – discontinued operations 0 641
Net cash (used in) provided by operating activities (3,561) 3,159
Cash flows from investing activities:    
Proceeds on redemption of marketable securities 595 6,273
Purchase of marketable securities (1,636)  
Purchase of fixed assets and other assets (483) (450)
Cash (used in) provided by investing activities – continuing operations (1,524) 5,823
Cash used in investing activities – discontinued operations 0 (9)
Net cash (used in) provided by investing activities (1,524) 5,814
Cash flows from financing activities:    
Tax benefit from exercise of stock-based compensation 0 1
Net cash provided by financing activities 0 1
Net (decrease) increase in cash and cash equivalents before effect of exchange rate changes (5,085) 8,974
Effect of exchange rate changes on cash and cash equivalents (163) 316
Net (decrease) increase in cash and cash equivalents (5,248) 9,290
Cash and cash equivalents at beginning of period 7,869 2,738
Cash and cash equivalents at end of period 2,621 12,028
Less cash and equivalents of discontinued operations at end of period 0 1,118
Cash and cash equivalents of continuing operations at end of period 2,621 10,910
Supplemental disclosures of cash flow information:    
Interest 18 17
Income Taxes $ 0 $ 0