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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Operating activities: |  |
Net loss | $ (4,006) | $ (9,680)
Adjustments to reconcile net loss to net cash provided by operating activities: |  |
Stock-based compensation expense | 7,291 | 5,927
Amortization of closing and earnout shares | 0 | 355
Amortization of intangible assets | 5,298 | 2,215
Depreciation and amortization | 1,047 | 316
Amortization of investment premiums and other | (73) | (23)
Deferred taxes | (5,232) | 3,541
Changes in assets and liabilities: |  |
Accounts receivable | 2,168 | (267)
Other assets | (769) | (1,838)
Accounts payable | 28 | 596
Accrued payroll and related taxes | (1,995) | 746
Deferred revenue | 1,733 | 1,565
Restructuring accrual | 3,082 | 0
Other liabilities | (684) | 919
Net cash provided by operating activities | 7,888 | 4,372
Investing activities: |  |
Purchases of investments | (14,175) | (15,391)
Sales and maturities of investments | 10,830 | 40,069
Acquisitions, net of cash acquired | 0 | (29,744)
Purchases of property and equipment | (975) | (3,176)
Net cash used in investing activities | (4,320) | (8,242)
Financing activities: |  |
Proceeds from the issuance of equity plan common stock | 4,912 | 495
Payment for acquisition-related contingent consideration | (1,030) | 0
Principal payments on other borrowings | (250) | (249)
Net cash provided by financing activities | 3,632 | 246
Foreign currency effect on cash and cash equivalents | (136) | (31)
Net increase (decrease) in cash and cash equivalents | 7,064 | (3,655)
Cash and cash equivalents at beginning of period | 9,028 | 12,289
Cash and cash equivalents at end of period | 16,092 | 8,634
Supplemental disclosures of cash flow information: |  |
Cash paid for income taxes | 310 | 128
Supplemental disclosures of non-cash investing and financing activities: |  |
Unrealized holding gain (loss) on available-for-sale investments | $ 26 | $ (28)

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