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 ($)
 9 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities    
Net income $ 2,587,767 $ 5,342,494
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,205,769 1,068,297
Impairment of long-lived assets 643,604 0
Deferred taxes 2,185,534
(Gain) loss on disposal of assets (5,100) 1,135
Stock-based compensation 1,774,330 843,658
Changes in operating assets and liabilities:    
Accounts receivable, net (53,619) (2,716,263)
Inventories (965,458) (923,530)
Prepaid expenses and other 324,206 (399,662)
Accounts payable and accrued expenses (2,989,849) 1,526,993
Net cash provided by operating activities 2,521,650 6,928,656
Cash flows from investing activities    
Purchases of property, plant and equipment and intangible assets (1,631,127) (982,245)
Proceeds from sale of property, plant and equipment 5,100
Purchases of investments (13,279,075) (5,508,075)
Proceeds from maturities of investments 6,619,000 5,761,000
Net cash used in investing activities (8,286,102) (729,320)
Cash flows from financing activities    
Proceeds from issuance of common stock under employee stock purchase plan 334,692 254,426
Proceeds from issuance of common stock upon exercise of stock options 28,718 473,651
Tax withholding related to exercise of stock options and restricted stock vestings (462,120) (77,291)
Repurchase of common stock (2,403,062) (333,761)
Net cash (used in) provided by financing activities (2,501,772) 317,025
(Decrease) increase in cash and cash equivalents (8,266,224) 6,516,361
Cash and cash equivalents, beginning of period 28,014,321 18,071,210
Cash and cash equivalents, end of period 19,748,097 24,587,571
Supplemental disclosures for cash flow information    
Cash paid during the year for income taxes 893,483 338,616
Non-cash financing activities    
Cashless exercise of stock options $ 34,268 $ 541,016