Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,168,332)	$ (2,035,310)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	120,618	208,600
Stock-based compensation expense	124,701	191,518
Provision for doubtful accounts	5,625
Deferred rent	(6,002)	(22,215)
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	173,298	(273,595)
Decrease (increase) in inventory	4,104	(11,580)
(Increase) in other current assets	(233,703)	(187,879)
Decrease in other assets	57,439	1,358
Increase in accounts payable and accrued expenses	107,980	93,792
(Decrease) in deferred revenue	(154,901)	(175,662)
(Decrease) in other long-term liabilities	(158,407)
Net cash used in operating activities	(2,127,580)	(2,210,973)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(127,505)	(12,794)
Collection of note receivable	20,034	19,185
Net cash (used in) provided by investing activities	(107,471)	6,391
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock from exercise of stock options	687,521	10,100
Net proceeds from issuance of common stock from exercise of warrants		137,500
Net cash provided by financing activities	687,521	147,600
Net decrease in cash	(1,547,530)	(2,056,982)
CASH, beginning of period	8,010,161	3,092,172
CASH, end of period	$ 6,462,631	$ 1,035,190

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