Note 9. Net Loss per Share

  

Basic net loss per share is computed by dividing net loss for the period by the weighted average shares of common stock outstanding during each period. Diluted net loss per share is computed by dividing net loss for the period by the weighted average shares of common stock, common stock equivalents and potentially dilutive securities outstanding during each period. The Company uses the treasury stock method to determine whether there is a dilutive effect of outstanding option grants.

  

The following table sets forth the computation of the Company’s basic and diluted net loss per share for the periods presented:

  

		Three Months Ended  March 31,
		2018			2017
Net loss		$	4,503,920		$	(2,369,833)
Weighted-average common shares used in computing net loss per share, basic and diluted			14,595,196			9,344,226
Net loss per share, basic and diluted		$	(0.31)		$	(0.25)

  

The following securities were excluded from the computation of diluted net loss per share for the periods presented because including them would have been anti-dilutive:

  

		Three Months Ended  March 31,
		2018			2017
Stock options (exercise price $1.30 - $4.50 per share)			725,000			500,000
Warrants (exercise price $1.10 - $7.43)			4,546,824			565,813
Total common stock equivalents			5,271,824			1,065,813