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, 2019
Mar. 31, 2018
Cash flows from operating activities    
Net income $ 1,377,902 $ 637,782
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 1,064,024 989,912
Change in allowance for doubtful accounts 210,000
Amortization of discount on investments (15,855)
Deferred taxes (384,000)
Loss on disposal of assets 1,594
Stock based compensation 1,102,190 969,081
Changes in operating assets and liabilities:    
Accounts receivable 3,623,266 78,265
Inventories, net 1,776,613 354,984
Other assets (486,554) (71,117)
Accounts payable, accrued expenses and deferred rent (179,024) (313,921)
Net cash provided by operating activities 8,472,562 2,262,580
Cash flows from investing activities    
Purchases of property, plant and equipment and intangible assets (551,607) (516,341)
Purchases of investments (12,274,393) (4,181,075)
Proceeds from maturities of investments 3,572,000 3,469,000
Business acquisition (10,350,000)
Net cash used in investing activities (9,254,000) (11,578,416)
Cash flows from financing activities    
Repurchases of common stock (236,024)
Proceeds from issuance of common stock under employee stock purchase plan 145,940 148,259
Proceeds from issuance of common stock upon exercise of stock options 24 17,949
Tax withholding related to vesting of restricted stock grants (6,676) (9,262)
Net cash provided by (used in) financing activities 139,288 (79,078)
Decrease in cash and cash equivalents (642,150) (9,394,914)
Cash and cash equivalents, beginning of period 8,547,777 18,536,111
Cash and cash equivalents, end of period 7,905,627 9,141,197
Supplemental disclosures for cash flow information    
Cash paid during the year for income taxes 1,051,716 23,987
Non-cash financing activities    
Cashless exercise of stock options $ 17,390 $ 5,782