Consolidated Statement of Stockholders' Equity (Unaudited) - 6 months ended Jun. 30, 2018 - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2017	$ 15,009	$ 126,416,869	$ (110,422,825)	$ 16,009,053
Balance, shares at Dec. 31, 2017	15,009,246
Stock-based compensation expense		124,701		124,701
Exercise of stock options	$ 594	686,927		687,521
Exercise of stock options, shares	593,838
Vesting of restricted stock	$ 22	(22)
Vesting of restricted stock, shares	22,155
Net loss			(2,168,332)	(2,168,332)
Balance at Jun. 30, 2018	$ 15,625	$ 127,228,475	$ (112,591,157)	$ 14,652,943
Balance, shares at Jun. 30, 2018	15,625,239

Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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