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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Operating activities |  |
Net income | $ 5,324 | $ 1,836
Depreciation and amortization | 3,956 | 2,242
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Amortization of deferred financing costs | 982 | 275
Stock based compensation expense | 790 | 1,375
Deferred taxes, net | 1,792 | 5,502
Changes in operating assets and liabilities |  |
Accounts receivable | 617 | 1,631
Other current assets | (57) | (162)
Accrued payroll | 178 | 1,260
Accounts payable, accrued expenses, and other current liabilities | 5,262 | 54
Other long-term assets/liabilities | (805) | 64
Net cash provided by operating activities | 18,039 | 14,077
Investing activities |  |
Business acquisition, net of cash acquired | (67,079) | 0
Purchase of equipment and improvements | (405) | (654)
Net cash used in investing activities | (67,484) | (654)
Financing activities |  |
Borrowing on senior debt | 70,000 | 0
Repayments of senior debt | (21,708) | (11,979)
Payment of deferred financing costs | (3,451) | (65)
Proceeds from stock option exercise | 39 | 46
Net cash provided by (used in) financing activities | 44,880 | (11,998)
Net change in cash and cash equivalents | (4,565) | 1,425
Cash and cash equivalents at beginning of year | 6,355 | 4,930
Cash and cash equivalents at end of year | 1,790 | 6,355
Supplemental disclosures of cash flow information |  |
Cash paid during the year for interest | 1,502 | 800
Cash paid during the year for income taxes | 543 | 876
Non-cash issuance of stock upon exercise of options | 0 | 25
Derivative warrant liability reclassified as equity | $ 0 | $ (306)

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