Quarterly report pursuant to Section 13 or 15(d)

Condensed Statements of Cash Flows (Unaudited)

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Condensed Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Cash flows from operating activities    
Net income $ 2,821,986 $ 1,358,034
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 706,176 545,782
Deferred taxes 501,000 712,000
Loss (gain) on disposal of assets 1,390 (13,290)
Stock-based compensation 473,193 $ 564,466
Tax benefit from stock-based awards (741,000)
Changes in operating assets and liabilities:    
Accounts receivable, net (1,843,207) $ 272,089
Inventories (919,675) 226,121
Prepaid expenses and other (166,124) (363,352)
Accounts payable and accrued expenses 1,455,588 (386,692)
Net cash provided by operating activities 2,289,327 2,915,158
Cash flows from investing activities    
Purchases of property, plant and equipment and intangible assets (421,637) (3,328,579)
Purchases of investments (3,820,075) (4,168,000)
Proceeds from maturities of investments 3,858,000 4,166,000
Net cash used in investing activities (383,712) $ (3,330,579)
Cash flows from financing activities    
Tax benefit from stock-based awards 741,000
Proceeds from issuance of common stock under employee stock purchase plan 118,013 $ 105,615
Proceeds from issuance of common stock upon exercise of stock options 84,738 $ 28,967
Tax withholding related to exercise of stock options (36,223)
Repurchase of common stock (333,761) $ (849,157)
Net cash provided by (used in) financing activities 573,767 (714,575)
Increase (decrease) in cash and cash equivalents 2,479,382 (1,129,996)
Cash and cash equivalents, beginning of period 18,071,210 18,191,493
Cash and cash equivalents, end of period 20,550,592 17,061,497
Supplemental disclosures for cash flow information    
Cash paid during the year for income taxes 83,884 4,750
Non-cash financing activities    
Cashless exercise of stock options $ 234,460 $ 80,802