Stockholders' Equity Note Disclosure [Text Block] | Note 9 Stockholders’ Equity Reverse Stock Split Effective January 8, 2018, pursuant to authority granted by the stockholders of the Company, the Company implemented a 1-for-3.75 reverse split of the Company’s issued and outstanding common stock and preferred stock (the “Reverse Split”). The number of authorized shares remains unchanged. All share and per share information has been retroactively adjusted to reflect the Reverse Split for all periods presented, unless otherwise indicated. Authorized Capital As of December 31, 2017, the Company was authorized to issue 60,000,000 0.0001 36,000,000 0.0001 20,000,000 5,714,286 10,000,000 On January 29, 2018, in connection with its IPO and the conversion of all then existing preferred stock into common stock, the Company filed its Third Amended and Restated Certificate of Incorporation (the “Third Amendment”) with the Secretary of State of the State of Delaware, effective the same day. Pursuant to the Third Amendment, the Company is authorized to issue 90,000,000 6,000,000 2014 Equity Incentive Plan The Company’s 2014 Equity Incentive Plan (“2014 Plan”) provides for the issuance of incentive stock options, nonstatutory stock options, rights to purchase common stock, stock appreciation rights, restricted stock and restricted stock units to employees, directors and consultants of the Company and its affiliates. The 2014 Plan became effective on December 14, 2014 and shall terminate on the tenth (10th) anniversary of the effective date. The 2014 Plan requires the exercise price of stock options to be greater than or equal to the fair value of the Company’s common stock on the date of grant. As of December 31, 2017, there were 48,917 shares available for future issuance under the 2014 Plan. On January 5, 2018, the Company’s Board of Directors and shareholders approved an amendment to the Company’s 2014 Plan to increase the number of shares of common stock authorized under the 2014 Plan from 1,733,333 1,866,667 Series A and Series A-2 Convertible Preferred Stock On October 6, 2016, the Company sold an aggregate of 788,827 5.25 4,141,338 On July 6, 2017, the Company’s Board of Directors adopted, and the Company’s stockholders approved, the Second Amendment to the Company’s Certificate of Incorporation (the “Second Amendment”). Pursuant to the Second Amendment, in the event that any holder of shares of Series A Convertible Preferred Stock or Series A-2 Convertible Preferred Stock (collectively, the “Series A/A-2 Preferred Stock”) does not participate in a subsequent financing (as defined in the Second Amendment) by purchasing in the aggregate, in such subsequent financing, at least 75 On September 27, 2017, in connection with the sale of Series B Convertible Preferred Stock, holders of an aggregate of 299,863 75 The preferred stock did not contain a redemption provision and an overall analysis of its features performed by the Company determined that it was more akin to equity and therefore, has been classified within stockholders’ equity on the balance sheet. While the embedded conversion option (“ECO”) was subject to an anti-dilution price adjustment, since the ECO was clearly and closely related to the equity host, it was not required to be bifurcated and accounted for as a derivative liability under ASC 815. The Company determined that the preferred stock did not contain a beneficial conversion feature, since the conversion price exceeded the estimated fair value of the Company’s common stock as of the commitment date. The Series A and Series A-2 Convertible Preferred Stock is convertible, at the option of the holder, at any time into shares of common stock on a one-for-one basis. In the event of any issuances by the Company for less than the in-force conversion price, the preferred stock conversion price shall be reduced on a weighted average basis. Each share of preferred stock shall automatically be converted into shares of common stock at the then effective conversion price: (i) immediately prior to the closing of a firm commitment underwritten initial public offering provided that (A) the aggregate offering price, net of underwriters’ discounts and expenses, is at least $2.00 per share of common stock and (B) the aggregate proceeds of such offering are not less than $20,000,000; or (ii) the date specified by written consent or agreement of the holders of at least 75% of the then outstanding shares of preferred stock. Series B Convertible Preferred Stock During the year ended December 31, 2017, the Company sold an aggregate of 918,983 6.98 6,409,651 41,958 6,367,693 On November 9, 2017, the Board adopted resolutions ratifying each of the issuances of Series B Convertible Preferred Stock, which were then approved by the Company’s shareholders. On November 13, 2017, the Company filed a certificate of validation with the Delaware Secretary of State in respect of such ratifications, such that, as of that date, the Series B Convertible Preferred Stock was duly authorized, validly issued, fully paid and nonassessable. The Series B Convertible Preferred Stock is convertible, at the option of the holder, at any time into shares of common stock on a one-for-one basis, subject to certain adjustments. In the event of any issuances by the Company for less than the in-force conversion price, the Series B Convertible Preferred Stock conversion price shall be reduced on a weighted average basis. Each share of Series B Convertible Preferred Stock shall automatically be converted into shares of common stock at the then effective conversion price: (i) immediately prior to the closing of a firm commitment underwritten initial public offering provided that (A) the aggregate offering price, net of underwriters' discounts and expenses, is at least $2.00 per share of common stock and (B) the aggregate proceeds of such offering are not less than $20,000,000; or (ii) the date specified by written consent or agreement of the holders of at least 75% of the then outstanding shares of preferred stock. The Series B Convertible Preferred did not contain a redemption provision and an overall analysis of its features performed by the Company determined that it was more akin to equity and therefore, has been classified within stockholders’ equity on the balance sheet. While the embedded conversion option (“ECO”) was subject to an anti-dilution price adjustment, since the ECO was clearly and closely related to the equity host, it was not required to be bifurcated and accounted for as a derivative liability under ASC 815. The Company determined that the Series B Convertible Preferred did not contain a beneficial conversion feature, since the conversion price exceeded the estimated fair value of the Company’s common stock as of the commitment date. See Note 10 Subsequent Events for additional details. Stock Warrants On September 27, 2017, the Company issued a warrant to purchase 61,875 6.98 431,574 Weighted Weighted Average Average Remaining Aggregate Number of Exercise Life Intrinsic Warrants Price In Years Value Outstanding January 1, 2017 - $ - Granted 61,875 6.98 Forfeited - - Outstanding December 31, 2017 61,875 $ 6.98 9.7 $ - Exercisable December 31, 2017 61,875 $ 6.98 9.7 $ - Warrants Outstanding Warrants Exercisable Weighted Outstanding Average Exercisable Exercise Number of Remaining Life Number of Price Warrants In Years Warrants 6.98 61,875 9.7 61,875 61,875 9.7 61,875 Stock Options For the Year Ended December 31, 2017 2016 Expected term (years) 5.32 - 10.00 10.00 Risk free interest rate 1.95 - 2.39 % 1.53% - 1.83 % Expected volatility 130 % 131 % Expected dividends 0.00 % 0.00 % The Company has computed the fair value of stock options granted using the Black-Scholes option pricing model. Option forfeitures are accounted for at the time of occurrence. The expected term used for options issued to non-employees is usually the contractual life and the expected term used for options issued to employees and directors is the estimated period of time that options granted are expected to be outstanding. The Company utilizes the “simplified” method to develop an estimate of the expected term of “plain vanilla” employee option grants. The Company does not currently have a trading history to support its historical volatility calculations. Accordingly, the Company is utilizing an expected volatility figure based on a review of the historical volatility of three comparable entities over a period of time equivalent to the expected life of the instrument being valued. The risk-free interest rate was determined from the implied yields from U.S. Treasury zero-coupon bonds with a remaining term consistent with the expected term of the instrument being valued. The weighted average estimated grant date fair value of the stock options granted for the year ended December 31, 2017 and 2016 was approximately $ 1.77 1.16 The Company recorded stock-based compensation expense related to stock options of $ 412,312 2,690 1,327,224 377,816 2.4 10.00 9.20 Weighted Weighted Average Average Remaining Aggregate Number of Exercise Life Intrinsic Options Price In Years Value Outstanding January 1, 2017 786,669 $ 1.37 Granted 897,747 1.95 Forfeited - - Outstanding December 31, 2017 1,684,416 $ 1.68 8.5 $ 4,361,825 Exercisable December 31, 2017 920,383 $ 1.39 7.6 $ 883,675 Options Outstanding Options Exercisable Weighted Outstanding Average Exercisable Exercise Number of Remaining Life Number of Price Options In Years Options $ 1.24 760,001 7.2 760,001 $ 1.95 897,747 9.5 152,465 $ 5.25 26,668 8.8 7,917 1,684,416 7.6 920,383 |