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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income (loss) | $ 4,568,627 | $ 1,986,801 | $ (5,866,134)
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 449,189 | 493,361 | 570,314
Share-based compensation expense: |  |  |
Stock options |  | 68,172 | 316,369
Stock awards | 191,749 | 183,222 | 149,952
Tax adjustment from share-based compensation |  | (7,899) | (54,055)
Provision for loss on unbilled receivables |  |  | 1,237,841
(Gain) loss on disposal of property and equipment |  | 3,605 | (61,817)
Excess and obsolete inventory cost | 92,829 |  | 225,742
Deferred income taxes | 41 | 494,016 | 2,743,616
(Increase) decrease in: |  |  |
Accounts receivable | 1,762,494 | (2,116,941) | 2,025,168
Unbilled receivables, net | 116,850 | 2,322,537 | 2,267,678
Inventories | (626,655) | 951,488 | 647,728
Prepaid expenses and other current assets | (91,280) | 371,684 | (250,331)
Other non-current assets | (32,967) |  | (75,300)
Increase (decrease) in: |  |  |
Accounts payable | (182,520) | 67,790 | (966,671)
Accrued expenses | (129,871) | (678,623) | (1,323,609)
Income taxes | (153,577) |  | (415,328)
Deferred revenue | 100,769 | (577,160) | 230,426
Net cash provided by operating activities | 6,065,678 | 3,562,053 | 1,401,589
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (153,038) | (352,762) | (188,509)
Proceeds from the sale of property and equipment |  | 1,108 | 69,545
Net cash (used in) investing activities | (153,038) | (351,654) | (118,964)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Proceeds from exercise of stock options |  |  | 39,000
Purchases of treasury stock |  | (724,777) | (254,170)
Net cash (used in) financing activities |  | (724,777) | (215,170)
Net increase in cash and cash equivalents | 5,912,640 | 2,485,622 | 1,067,455
Cash and cash equivalents, beginning of year | 18,767,661 | 16,282,039 | 15,214,584
Cash and cash equivalents, end of year | 24,680,301 | 18,767,661 | $ 16,282,039
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION |  |  |
Cash paid for income tax | $ 400,000 | 175,000 |
Cash received from income tax refund |  | $ 364,836 |

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