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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net (loss) income | $ (3,653,905) | $ 4,568,627 | $ 1,986,801
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation and amortization | 436,208 | 449,189 | 493,361
Share-based compensation expense: |  |  |
Stock options |  |  | 68,172
Stock awards | 199,995 | 191,749 | 183,222
Tax adjustment from share-based compensation |  |  | (7,899)
(Gain) loss on disposal of property and equipment |  |  | 3,605
Excess and obsolete inventory cost |  | 92,829 |
Deferred income taxes | 61,852 | 41 | 494,016
(Increase) decrease in: |  |  |
Accounts receivable | 225,336 | 1,762,494 | (2,116,941)
Unbilled receivables, net | 554,190 | 116,850 | 2,322,537
Inventories | (100,454) | (626,655) | 951,488
Prepaid expenses and other current assets | 288,899 | (91,280) | 371,684
Other non-current assets |  | (32,967) |
Increase (decrease) in: |  |  |
Accounts payable | 208,541 | (182,520) | 67,790
Accrued expenses | (297,016) | (129,871) | (678,623)
Income taxes | 258,931 | (153,577) |
Deferred revenue | 76,447 | 100,769 | (577,160)
Net cash (used in) provided by operating activities | (1,740,976) | 6,065,678 | 3,562,053
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Purchases of property and equipment | (2,548,612) | (153,038) | (352,762)
Proceeds from the sale of property and equipment |  |  | 1,108
Net cash (used in) investing activities | (2,548,612) | (153,038) | (351,654)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Purchase of treasury stock |  |  | (724,777)
Net cash (used in) financing activities |  |  | (724,777)
Net increase in cash and cash equivalents | (4,289,588) | 5,912,640 | 2,485,622
Cash and cash equivalents, beginning of year | 24,680,301 | 18,767,661 | 16,282,039
Cash and cash equivalents, end of year | 20,390,713 | 24,680,301 | 18,767,661
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION |  |  |
Cash paid for income tax |  | $ 400,000 | 175,000
Cash received from income tax refund | 265,588 |  | $ 364,836
SUPPLEMENTAL DISCLOSURE OF NONCASH INFORMATION |  |  |
Transfer from unbilled to accounts receivable | $ 926,632 |  |

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