Note 10. Stockholders’ Equity

Changes in stockholders’ equity

Changes in stockholders’ equity were as follows for the six months ended April 30, 2018:

	Total Stockholders’ Equity
Balance as of October 31, 2017	$	101,256
Share-based compensation		1,378
Proceeds from common stock issuance and warrant exercises, net of fees		3,268
Common stock issued, non-employee compensation		282
Taxes paid upon vesting of restricted stock awards, net of stock issued under benefit plans		(621	)
Preferred dividends – Series B		(1,600	)
Conversion of Redeemable Series C preferred stock		15,598
Other comprehensive income - foreign currency translation adjustments		87
Net loss		(17,357	)
Balance as of April 30, 2018	$	102,291

Authorized Common Stock

On December 14, 2017, the number of authorized shares of the Company’s common stock was increased from 125,000,000 to 225,000,000, by a vote of the holders of a majority of the outstanding shares of the Company’s common stock.

NASDAQ Marketplace Rule 5635(d)

On December 14, 2017, in accordance with NASDAQ Marketplace Rule 5635(d), the Company’s common stockholders approved the issuance of shares of the Company’s common stock exceeding 19.9% of the number of shares outstanding on September 5, 2017, upon the conversion and/or redemption of the Series C Convertible Preferred Stock issued in an underwritten offering in September 2017.

Public Offerings and Outstanding Warrants

On May 3, 2017, the Company completed an underwritten public offering of (i) 12,000,000 shares of its common stock, (ii) Series C warrants to purchase 12,000,000 shares of its common stock and (iii) Series D warrants to purchase 12,000,000 shares of its common stock. The Series C warrants have an exercise price of $1.60 per share and a term of five years. A total of 11,536 shares of common stock were issued during the first six months of fiscal year 2018 upon exercise of Series C warrants and the Company received total proceeds of $0.02 million in connection with such exercises. The Series D warrants have an exercise price of $1.28 per share and a term of one year. A total of 2,584,174 shares of common stock were issued during the first six months of fiscal year 2018 upon the exercise of Series D warrants and the Company received total proceeds of $3.3 million in connection with such exercises. As of April 30, 2018, all Series D warrants have been exercised.

On July 12, 2016, the Company closed on a registered public offering of securities to a single institutional investor pursuant to a placement agent agreement with J.P. Morgan Securities LLC. In conjunction with the offering, the Company issued 7,680,000 Series A Warrants, all of which remained outstanding as of April 30, 2018, at an exercise price of $5.83 per share.

The following table summarizes outstanding warrant activity during the six months ended April 30, 2018:

	Series A Warrants		Series C Warrants			Series D Warrants
Balance as of October 31, 2017		7,680,000		11,580,900			2,584,174
Warrants exercised		—		(11,536	)		(2,584,174	)
Warrants expired		—		—			—
Balance as of April 30, 2018		7,680,000		11,569,364			—