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The Company and Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]  
Schedule of outstanding warrants to purchase of common stock
As of June 30, 2019 and December 31, 2018, the company had the following outstanding warrants to purchase common stock:
 
Warrant type
 
Number of shares
  
Exercise price
  
Expiration date
Pre-funded
common stock
  2,310,776  $ 0.001  None
Common stock
  662,500  $2.35  January 2023
Common stock
  36,910,809  $0.30  October 2023
Summary of Computation of Basic and Diluted Net Income (Loss) Per Share
The following table sets forth the computation of basic and diluted net income (loss) per share for the periods indicated (in thousands, except per share amounts):
 
  
Three months ended

June 30,
  
Six months ended

June 30,
 
  
2019
  
2018
  
2019
  
2018
 
Numerator:
                
Net income (loss)
 $(103 $315  $(93 $663 
  
 
 
  
 
 
  
 
 
  
 
 
 
Denominator:
                
Add: weighted-average common shares outstanding
  43,171   8,171   43,115   8,151 
  
 
 
  
 
 
  
 
 
  
 
 
 
Total shares: basic
  43,171   8,171   43,115   8,151 
Add: weighted-average stock options outstanding
  —     81   —     72 
Add: weighted-average unvested restricted stock units
  —     157   —     155 
  
 
 
  
 
 
  
 
 
  
 
 
 
Total shares: diluted
  43,171   8,409   43,115   8,378 
Net income (loss) per share:
                
Basic
 $(0.00 $0.04  $(0.00 $0.08 
  
 
 
  
 
 
  
 
 
  
 
 
 
Diluted
 $(0.00 $0.04  $(0.00 $0.08 
  
 
 
  
 
 
  
 
 
  
 
 
 
Schedule of Antidilutive Securities Excluded from Computation of Diluted Net Loss Per Share
The following table sets forth securities outstanding which were excluded from the computation of diluted net income (loss) per share as their inclusion would be anti-dilutive (in thousands):
 
  
Three months ended

June 30,
  
Six months ended

June 30,
 
  
2019
  
2018
  
2019
  
2018
 
Options outstanding to purchase common stock
  1,628   144   1,628   144 
Unvested restricted common stock units
  2,148   —     2,148   —   
Convertible debt
  4,809   2,271   4,809   2,271 
Outstanding warrants
  39,884   —     39,884   —   
  
 
 
  
 
 
  
 
 
  
 
 
 
Total
  48,469   2,415   48,469   2,415