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v3.6.0.2

Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Operating activities |  |
Net income | $ 12,147,088 | $ 1,817,672
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock-based compensation | 342,610 | 209,864
Depreciation | 279,392 | 197,686
Changes in deferred taxes | (9,764,622) | 31,940
Changes in operating assets and liabilities: |  |
Accounts receivable | (507,994) | (462,182)
Inventories | (211,349) | (368,763)
Prepaid expenses and other current assets | (171,908) | 38,151
Other assets |  | 10,000
Accounts payable and accrued expenses | (633,241) | (792,581)
Accrued payroll and related expenses | 30,043 | 74,733
Customer deposit | (640,440) | 640,440
Net deferred revenue on shipments to distributors | 58,382 | 25,705
Deferred service revenue | (51,992) | (89,267)
Change in deferred rent | 3,847 | 19,578
Net cash provided by operating activities | 879,816 | 1,352,976
Investing activities |  |
Purchase of equipment | (304,470) | (391,375)
Net cash used in investing activities | (304,470) | (391,375)
Financing activities |  |
Payments on capital leases | (31,152) | (27,295)
Proceeds from borrowings under bank line of credit agreement | 350,000 | 138,453
Repayments of borrowings under bank line of credit agreement | (350,000) | (954,434)
Stock options exercised | 178,512 | 155,949
Warrants exercised | 158,145 | 131,250
Repayments of related party and short term credit line notes payable | (500,000) | (100,000)
Net cash used in financing activities | (194,495) | (656,077)
Net increase in cash and cash equivalents | 380,851 | 305,524
Cash and cash equivalents at beginning of year | 938,155 | 632,631
Cash and cash equivalents at end of year | 1,319,006 | 938,155
Supplemental cash flow information |  |
Cash paid for interest | 13,261 | 143,067
Cash paid for income taxes | 100,988 |
Supplemental disclosure of non-cash investing activities |  |
Computer equipment purchased under capital lease | 64,102 | 36,482
Cashless exercise of warrants | $ 35 |

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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration