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Common Stock Warrants

12 Months Ended

Dec. 31, 2018

Warrants and Rights Note Disclosure [Abstract]

Note 8 — Common Stock Warrants

In May 2017, the Company issued a warrant to purchase 600,000 shares of its common stock to consultants for business strategy and intellectual property advisory services. The warrant vested at issuance in May 2017 and has a $0.01 exercise price per warrant share and expires five years from the date of issuance. The Company used the BSM to value the warrant and the fair value at the date of issuance was $121 based on an expected term of five years, volatility of 85%, a risk-free interest rate of 1.8% and a 0% rate on expected dividends. The $121 amount for the consulting warrants was expensed as a component of the Company’s general and administrative expenses in May 2017.

In conjunction with the closing of the Series A Preferred offering in June 2017 (see Note 6), the Company issued a warrant to purchase 649,409 shares of its common stock to the placement agent at an exercise price of $3.00 per share, provided, however, upon the conversion of the Series A Preferred, the warrant adjusted to entitle the holder to purchase shares of common stock equal to 10.0% of the shares of common stock issuable upon conversion of the Series A Preferred (excluding 191,000 shares of Series A Preferred that were purchased by insiders) and the exercise price would adjust to the conversion price of the Series A Preferred. This warrant vested at issuance in June 2017. The Company used the BSM to value the warrant and the fair value at the date of issuance was $479. Prior to the Company’s IPO in November 2018, the number of common shares issuable upon the exercise of this warrant was not fixed as it could vary by a factor of 1.000 to 1.333 common shares per warrant share in accordance with the IPO price, and the Company considered the warrant to be a derivative instrument (see Note 4). The $479 amount was recorded as a component of the issuance costs for the Series A Preferred in June 2017. As of December 31, 2017, the fair value of the warrant was $520 and the $41 increase in fair value during 2017 was recorded as a component of other income and expense.

As of November 15, 2018, the fair value of the warrants was $3,103 and the $2,583 increase in fair value during 2018 was recorded as a component of other income and expense. The fair value assumptions included an expected term of five years, expected volatility of 85%, a risk-free interest rate of 2.9% and estimate of the conversion rate. These warrants were classified as warrant liability on the Company’s balance sheets prior to the IPO in November 2018. In connection with the Company’s IPO, the number of shares issuable upon the exercise of these warrants became fixed at 704,184 shares which eliminated the fair value adjustment after that date. At the IPO date, the warrant liability was reclassified to additional paid-in-capital.

During November 2018, in connection with the IPO, the Company issued warrants for 414,000 shares of its common stock to the placement agent at an exercise price of $7.50 per share.

The weighted average exercise price of the outstanding warrants for the consultant and placement agent as of December 31, 2018 and 2017 was $3.04 and $1.56 per share, respectively.

Listed below is a summary of warrants outstanding as of December 31, 2018:

Description of Warrants	No. of Shares		Exercise Price
Business Advisory Warrants		600,000	$	0.01
Placement Agent Warrants - Series A Preferred		704,184	$	3.00
Placement Agent Warrants - IPO		414,000	$	7.50
Total		1,718,184	$	3.04 (Avg)

The holders of these warrants or their permitted transferees, are entitled to rights with respect to the registration under the Securities Act of their shares that are converted to common stock, including demand registration rights and piggyback registration rights. These rights are provided under the terms of a registration rights agreement between the Company and the investors.