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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Operating Activities: |  |
Net income (loss) | $ 2,784,992 | $ (3,745,042)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |
Depreciation and amortization | 824,889 | 483,087
Provision for doubtful accounts | (23,407) | 150,000
Warranty provision | 85,078 | 6,093
Inventory obsolescence | 142,288 | 171,535
Share-based compensation | 735,003 | 584,873
Deferred income taxes | 570,000 | 2,374,000
Gain on disposition of asset |  | 252
Loss on impairment of patents |  | 11,133
Changes in operating assets and liabilities: |  |
Accounts receivable | (854,676) | 3,149,579
Inventories | 756,732 | (1,648,484)
Prepaid expenses and other | 1,358,690 | (2,075,323)
Other assets | 116,973 | (60,615)
Accounts payable | (2,211,695) | 192,638
Payroll and related | (67,692) | 127,623
Warranty settlements | (34,065) | (11,395)
Accrued and other liabilities | 5,671,921 | 1,541,865
Net cash provided by operating activities | 9,855,031 | 1,251,819
Investing Activities: |  |
Purchases of marketable securities | (4,495,228) | (4,920,547)
Proceeds from maturities of marketable securities | 4,228,068 | 5,190,821
Capital expenditures | (343,126) | (625,845)
Purchase of Genasys, net of cash and restricted cash acquired |  | (2,431,795)
Net cash used in investing activities | (610,286) | (2,787,366)
Financing Activities: |  |
Proceeds from exercise of stock options | 703,313 | 2,434,888
Repurchase of common stock | (2,171,022) | (725,445)
Proceeds from the issuance of unsecured promissory notes |  | 62,656
Payments on promissory notes | (17,044) | (1,175,205)
Net cash (used in) provided by financing activities | (1,484,753) | 596,894
Effect of foreign exchange rate on cash | (49,148) | (59,160)
Net increase (decrease) in cash, cash equivalents, and restricted cash | 7,710,844 | (997,813)
Cash, cash equivalents and restricted cash, beginning of period | 11,806,074 | 12,803,887
Cash, cash equivalents and restricted cash, end of period | 19,516,918 | 11,806,074
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows | 19,516,918 | 12,803,887
Supplemental disclosures of cash flow information: |  |
Interest paid | 2,860 | 18,015
Noncash investing and financing activities: |  |
Change in unrealized gain (loss) on marketable securities | 20,307 | (7,676)
Business combinations accounted for as a purchase: |  |
Fair value of assets acquired |  | 5,520,504
Cash paid or payable |  | (3,011,439)
Liabilities assumed |  | $ 2,509,065

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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3151-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26853-111562 + Details
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- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116856206&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(5)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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