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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Operating activities |  |
Net income | $ 3,288 | $ 3,384
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Depreciation and amortization | 1,724 | 1,244
Amortization of debt financing costs as interest expense | 268 | 289
Change in fair value of derivative financial instruments | 102 | 27
Stock based compensation expense | 662 | 465
Loss on retirement of equipment | 31 | 3
Deferred taxes, net | 1,776 | (1,108)
Changes in operating assets and liabilities |  |
Accounts receivable | (5,274) | (3,351)
Other current assets | (56) | (113)
Accounts payable, accrued payroll, accrued expenses and other current liabilities | 3,945 | 5,106
Other long term assets/liabilities | 58 | 94
Net cash provided by operating activities | 6,524 | 6,040
Investing activities |  |
Acquisition net of cash acquired | (250) | (32,241)
Purchase of equipment and improvements | (1,064) | (498)
Net cash used in investing activities | (1,314) | (32,739)
Financing activities |  |
Net (repayments) borrowings on senior debt | (3,750) | 23,437
Repayments of capital lease obligations | (86) | (94)
Payment of deferred financing costs | 0 | (1,333)
Proceeds from issuance of stock | 0 | 2,521
Proceeds from stock option exercise | 129 | 37
Net cash provided by (used in) financing activities | (3,707) | 24,568
Net change in cash and cash equivalents | 1,503 | (2,131)
Cash and cash equivalents at beginning of period | 3,427 | 5,558
Cash and cash equivalents at end of period | 4,930 | 3,427
Supplemental disclosures of cash flow information |  |
Cash paid during the period for interest | 883 | 454
Cash paid during the period for income taxes | 337 | 124
Non-cash equity consideration for acquisition | $ 0 | $ 2,500
Warrants issued in connection with subordinated debt | 0 | 177

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