Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (1,212,991)	$ (1,067,957)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	62,110	59,150
Noncash stock-based compensation expense	369,739	60,708
Deferred rent		(13,505)
Changes in assets and liabilities:
Decrease (increase) in accounts receivable	222,600	(50,389)
(Increase) decrease in inventory	(1,119)	3,357
(Increase) in other current assets	(51,902)	(21,421)
Decrease (increase) in other assets	1,964	(627)
Increase in accounts payable and accrued expenses	13,479	180,034
Increase in deferred revenue	53,871	65,295
(Decrease) in other long-term liabilities		(79,204)
Net cash used in operating activities	(542,249)	(864,559)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,540)	(77,399)
Collection of note receivable	10,372	9,968
Net cash provided by (used in) investing activities	6,832	(67,431)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from issuance of common stock from exercise of stock options		687,521
Net cash provided by financing activities		687,521
Net decrease in cash	(535,417)	(244,469)
CASH, beginning of period	4,376,017	8,010,161
CASH, end of period	$ 3,840,600	$ 7,765,692