Quarterly report pursuant to Section 13 or 15(d)

Capital Structure

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Capital Structure
3 Months Ended
Mar. 31, 2017
Equity [Abstract]  
Capital Structure
Capital Structure

On October 20, 2015, the Company filed an amended and restated certificate of incorporation in connection with the closing of its IPO. The amended and restated certificate of incorporation authorizes the Company to issue two classes of stock, common stock and preferred stock, and eliminates all references to the previously existing series of preferred stock. At March 31, 2017, the total number of shares of capital stock the Company was authorized to issue was 205,000,000 of which 200,000,000 was common stock and 5,000,000 was preferred stock. All shares of common and preferred stock have a par value of $0.001 per share.

Common Stock
 
Initial Public Offering
 
On October 20, 2015, the Company closed an IPO of its units. Each unit consisted of one share of common stock, one Class A warrant to purchase one share of common stock at an exercise price of $4.55 per share and one Class B warrant to purchase one-half share of common stock at an exercise price of $3.90 per full share (the “units”). The Class A warrants expire on October 20, 2018 and the Class B warrants expired on April 20, 2017. The closing of the IPO resulted in the sale of 4,000,000 units at an initial public offering price of $6.50 per unit for gross proceeds of $26.0 million. The net proceeds of the IPO, after underwriting discounts, commissions and expenses, and before offering expenses, to the Company were approximately $23.6 million. On November 13, 2015, the units separated into common stock, Class A warrants and Class B warrants and began trading separately on the NASDAQ Capital Market.
 
On November 23, 2015, the underwriter of the IPO exercised its over-allotment option for 20,000 shares of common stock, 551,900 Class A warrants to purchase one share of common stock and 551,900 Class B warrants to purchase one-half share of common stock for additional gross proceeds of $135,319.
 
The common stock and accompanying Class A warrants and Class B warrants have been classified to stockholders’ equity in the Company’s balance sheet.
 
Underwriter’s Unit Purchase Option
 
The underwriter of the IPO received, for $100 in the aggregate, to purchase up to a total of 40,000 units (or 1% of the units sold in the IPO) exercisable at $7.48 per unit (or 115% of the public offering price per unit in the IPO). The units underlying the UPO will be, immediately upon exercise, separated into shares of common stock and the Underwriters’ Warrants such that, upon exercise, the holder of a UPO will not receive actual units but will instead receive the shares of common stock and Underwriters’ Warrants, to the extent that any portion of the Underwriters’ Warrants underlying such units have not otherwise expired. The exercise prices of the underwriters’ Class A warrants and underwriter’s Class B warrants underlying the UPO are $5.23 and $4.49, respectively. The UPO may be exercised for cash or on a cashless basis, at the holder’s option, and expires on October 14, 2020; provided, that, following the expiration of underwriters’ Class B warrants on April 20, 2017, the UPO will be exercisable only for shares of common stock and underwriters’ Class A warrants at an exercise price of $7.475 per unit; provided further, that, following the expiration of underwriters’ Class A warrants on October 20, 2018, the UPO will be exercisable only for shares of common stock at an exercise price of $7.47. The Company classified the UPO as a liability as it is a freestanding marked-to-market derivative instrument that is precluded from being classified in stockholders’ equity. The fair value of the UPO is re-measured each reporting period and the change in fair value is recognized in the statement of operations (see Note 4).
 
The Aspire Capital Transaction
 
On September 8, 2016, the Company entered into a common stock purchase agreement (the “Purchase Agreement”) with Aspire Capital, pursuant to which Aspire Capital committed to purchase up to an aggregate of $15.0 million of shares of the Company’s common stock over the 30-month term of the Purchase Agreement. Under the Purchase Agreement, on any trading day selected by the Company on which the closing price of the Company’s common stock exceeds $0.50, the Company may, in its sole discretion, present a purchase notice directing Aspire Capital to purchase up to 50,000 shares of common stock per day, up to $15.0 million of the Company’s common stock in the aggregate at a per share price calculated by references to the prevailing market price of the Company’s common stock. Upon execution of the Purchase Agreement, the Company issued and sold to Aspire Capital 250,000 shares of common stock at a price per share of $4.00, for gross proceeds of $1.0 million, and concurrently entered into a registration rights agreement with Aspire Capital registering the shares of the Company’s common stock that have been and may be issued to Aspire Capital under the Purchase Agreement. Additionally, as consideration for Aspire Capital entering into the Purchase Agreement, the Company issued 175,000 shares of common stock as a commitment fee. The net proceeds of the Aspire Capital transaction, after offering expenses, to the Company were approximately $1,900,000 for the year ended December 31, 2016. As of December 31, 2016, the Company had sold 763,998 shares of common stock to Aspire Capital under the Purchase Agreement. During the three months ended March 31, 2017, the Company sold an additional 965,165 shares of common stock to Aspire Capital under the terms of the Purchase Agreement for gross proceeds of approximately $789,000. As of the date of this Quarterly Report on Form 10-Q, the Company does not have any remaining shares available to issue under the purchase agreement. The Company may not issue any additional shares of common stock to Aspire Capital under the Purchase Agreement unless shareholder approval is obtained. 1,115,165

The Maxim Group Equity Distribution Agreement

On January 27, 2017, the Company entered into an Equity Distribution Agreement with Maxim Group LLC ("Maxim"), as sales agent, pursuant to which the Company may offer and sell, from time to time, through Maxim, up to $12,075,338 in shares of its common stock. The Company has no obligation to sell any of the shares, and may at any time suspend offers under the Equity Distribution Agreement.

As of the March 31, 2017, the Company had sold 501,859 shares of its common stock through Maxim under the Equity Distribution Agreement for gross proceeds of $412,000 and may sell up to approximately $2.9 million in additional shares of its common stock under the registration statement on Form S-3.

 
Common Stock Warrants
 
At March 31, 2017, the following common stock purchase warrants were outstanding:
 
Number of shares
 
Exercise price
 
Expiration
underlying warrants
 
per share
 
date
130,233
 
$
28.00

 
April 2017
2,275,950
 
$
3.90

 
April 2017
20,000*
 
$
4.49

 
April 2017
14,284
 
$
28.00

 
July 2017
80,966
 
$
28.00

 
August 2018
4,551,900
 
$
4.55

 
October 2018
40,000*
 
$
5.23

 
October 2018
3,571
 
$
28.00

 
December 2018
22,328*
 
$
8.40

 
October 2020
2,380
 
$
8.68

 
May 2022
7,141,612
 
 
 
 
 
*    Accounted for as a liability instrument (see Note 4)