Stockholders' Equity Note Disclosure [Text Block] | Note 7 – 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 number of authorized shares was unchanged as a result of the reverse split. All share and per share information has been retroactively adjusted to reflect the reverse split for all periods presented, unless otherwise indicated. Authorized Capital 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 shares of common stock and 6,000,000 shares of preferred stock. The holders of the Company’s common stock are entitled to one vote per share. No shares of preferred stock were designated. Pursuant to the Third Amendment, the Board of Directors is empowered, without stockholder approval, to issue preferred stock with dividend, liquidation, redemption, voting or other rights. Equity Incentive Plans On January 5, 2018, the Company’s Board of Directors and stockholders approved an amendment to the Company’s 2014 Equity Incentive Plan (“2014 Plan”) to increase the number of shares of common stock authorized under the 2014 Plan from 1,733,333 shares to 1,866,667 shares. On March 6, 2018, the Company’s Board of Directors adopted the 2018 Omnibus Stock Incentive Plan (“2018 Plan”), subject to stockholder approval. The 2018 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 2018 Plan was approved by Company stockholders at its annual meeting of stockholders on June 11, 2018. The 2018 Plan terminates on June 11, 2028. The 2018 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. There are 750,000 shares of common stock authorized under the 2018 Plan. Conversion of Preferred Stock Immediately prior to the closing of the IPO on January 29, 2018, all outstanding shares of preferred stock were automatically converted into an aggregate of 4,702,116 shares of the Company’s common stock. Initial Public Offering On January 29, 2018, the Company consummated its IPO of 2,730,000 shares of its common stock at an offering price of $10.00 per share, generating $27.3 million and $24.5 million in gross and net proceeds, respectively. Underwriting discounts, commissions and other offering expenses were approximately $2.8 million, which were recorded as a reduction of additional paid-in capital. Stock Options On April 16, 2018, the Compensation Committee of the Board of Directors approved the grant of ten-year stock options to purchase 175,668 shares of common stock to Company employees and consultants under the 2014 Plan. The stock options will vest in equal monthly increments over 36 months beginning on the one-month anniversary of the date of grant and have an exercise price of $8.72 per share, which represents the closing stock price on the date of grant. The stock options had a grant date fair value of $1,412,700, which will be recognized over the vesting period. In applying the Black-Scholes option pricing model to stock options granted, the Company used the following approximate assumptions: For the Three and Six Months Ended June 30, 2018 Expected term (years) 5.82 - 10.00 Risk free interest rate 2.69% - 2.83 % Expected volatility 140 % Expected dividends 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 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 three and six months ended June 30, 2018 was approximately $8.72 per share. There were no stock options granted during the three and six months ended June 30, 2017. The Company recorded stock-based compensation expense related to stock options of $652,088 and $6,390 during the six months ended June 30, 2018 and 2017, respectively. For the three months ended June 30, 2018 and 2017, the Company recorded stock-based compensation expense related to stock options of $1,512 (which includes a credit associated with the mark-to-market of non-employee options) and $3,094, respectively. As of June 30, 2018, there was $3,087,133 of unrecognized stock-based compensation expense, of which, $1,231,336 related to non-employee grants, which will be recognized over a weighted average period of 2.3 years. A summary of the option activity during the six months ended June 30, 2018 is presented below: Weighted Weighted Average Average Remaining Aggregate Number of Exercise Life Intrinsic Options Price In Years Value Outstanding January 1, 2018 1,684,416 $ 1.68 Granted 175,668 8.72 Forfeited - - Outstanding June 30, 2018 1,860,084 $ 2.35 8.1 $ 7,780,706 Exercisable June 30, 2018 1,116,438 $ 1.48 7.3 $ 5,318,423 The following table presents information related to stock options as of June 30, 2018: Options Outstanding Options Exercisable Weighted Outstanding Average Exercisable Exercise Number of Remaining Life Number of Price Options In Years Options $ 1.24 760,001 6.7 760,001 $ 1.95 897,747 9.0 335,427 $ 5.25 26,668 8.3 11,250 $ 8.72 175,668 9.8 9,760 1,860,084 7.3 1,116,438 |