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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash flows from operating activities:    
Net income (loss) from continuing operations $ (1,988) $ 2,243
Net income from discontinued operations 16,428 263
Net income 14,440 2,506
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation 506 365
Amortization of intangibles 119 120
Loss on disposal of property, equipment and improvements 4 0
Gain on sale of discontinued operations (16,838) 0
Foreign exchange gain (loss) (263) 42
Non-cash changes in accounts receivable (38) (31)
Non-cash changes in inventory 555 294
Stock-based compensation expense on stock options and restricted stock awards 691 577
Deferred income taxes 173 24
(Increase) decrease in cash surrender value of life insurance 9 (135)
Changes in operating assets and liabilities:    
(Increase) decrease in accounts receivable 5,191 (3,705)
(Increase) decrease in officer life insurance settlement receivable (256) 413
Increase in inventories (2,562) (574)
(Increase) decrease in refundable income taxes (654) 15
Increase in other assets and deferred costs (522) (223)
Increase in investment in lease (810) 0
Increase (decrease) in accounts payable and accrued expenses (2,401) 5,208
Increase (decrease) in deferred revenue 262 (27)
Decrease in pension and retirement plans liability (120) (82)
Increase in income taxes payable 464 52
Increase (decrease) in other long term liabilities 576 (193)
Net cash provided by (used in) operating activities of continuing operations (1,474) 4,646
Net cash provided by (used in) operating activities of discontinued operations 4,491 (1,987)
Net cash provided by (used in) operating activities of continuing operations 3,017 2,659
Cash flows from investing activities:    
Life insurance premiums paid (150) (150)
Proceeds from sale of discontinued operations 14,387 0
Purchases of property, equipment and improvements (438) (207)
Net cash provided by investing activities of continuing operations 13,799 (357)
Net cash used in investing activities of discontinued operations (154) (151)
Net cash provided by investing activities of continuing operations 13,645 (508)
Cash flows from financing activities:    
Dividends paid (1,921) (1,722)
Principal payments on capital leases (70) 0
Proceeds from issuance of shares under equity compensation plans 253 216
Net cash used in financing activities (1,738) (1,506)
Effects of exchange rate on cash (238) 137
Net increase in cash and cash equivalents 14,686 782
Cash and cash equivalents beginning of period 13,885 7,538
Cash and cash equivalents, end of period   13,885
Cash and cash equivalents 0 3,464
Cash and cash equivalents 25,107 10,421
Supplementary cash flow information:    
Cash paid for income taxes 900 1,142
Cash paid for interest $ 73 $ 75