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The Company (Tables)
 6 Months Ended
Jun. 30, 2019
The Company [Abstract]  
Fair Value Measurements Using Significant Unobservable Inputs (Level 3)
The table below provides a reconciliation of the beginning and ending balance for the liability measured at fair value using significant unobservable inputs (Level 3).
 
Issuance Date
 
December 31, 2018
  
Increase in
Fair Value
  
June 30, 2019
 
October 31, 2013
 
$
-
  
$
-
  
$
-
 
  
$
-
  
$
-
  
$
-
 
 

 
Issuance Date
 
January 1, 2018
  
Increase in
Fair Value
  
June 30, 2018
 
October 31, 2013
 
$
2
  
$
11
  
$
13
 
February 5, 2014
  
1
   
11
   
12
 
  
$
3
  
$
22
  
$
25
 
Calculation of Basic and Diluted Loss Per Share by Class of Security
The following table presents the calculation of basic and diluted loss per share by each class of security for the three and six months ended June 30, 2019 and 2018:
 
  
Three Months Ended
June 30, 2019
  
Six Months Ended
June 30, 2019
 
  
Common Stock
  
Series C
Convertible Preferred Stock
  
Common Stock
  
Series C
Convertible Preferred Stock
 
             
Loss attributable to each class
 
$
(1,007
)
 
$
(75
)
 
$
(2,226
)
 
$
(189
)
                 
Weighted average number of shares outstanding during the period
  
31,359,104
   
6,250
   
31,033,114
   
7,093
 
                 
Basic and Diluted loss per share
 
$
(0.03
)
 
$
(11.94
)
 
$
(0.07
)
 
$
(26.66
)
  
Three Months Ended
June 30, 2018
  
Six Months Ended
June 30, 2018
 
  
Common Stock
  
Series C
Convertible Preferred Stock
  
Common Stock
  
Series C
Convertible Preferred Stock
 
Loss attributable to each class
 
$
(958
)
 
$
(671
)
 
$
(1,638
)
 
$
(2,072
)
                 
Weighted average number of shares outstanding during the period
  
13,734,384
   
25,847
   
9,078,741
   
30,897
 
                 
Basic and Diluted loss per share
 
$
(0.07
)
 
$
(25.96
)
 
$
(0.18
)
 
$
(67.07
)
Antidilutive Securities Excluded from Computation of Earnings Per Share
The weighted average of potential common stock equivalents outstanding during the three and six months ended June 30, 2019 and 2018 have been excluded from the loss per share calculation as their inclusion would have been anti-dilutive:
 
 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2019
 
2018
 
2019
 
2018
Common stock purchase warrants
 
2,034,882
 
2,396,721
 
   2,133,489
 
2,401,646
Restricted stock units
 
120,773
 
17,028
 
      125,150
 
17,028
Common stock options
 
4,184,193
 
3,037,796
 
   4,252,682
 
1,962,933
Total
 
6,339,848
 
5,451,545
 
   6,511,321
 
4,381,607
Impact of Adoption of New Accounting Standards on the Statement of Operations and Comprehensive Loss
The impact from adopting ASU 2017-11 on the Company’s unaudited condensed balance sheets and consolidated statements of operations as of and for the following periods is as follows:
 
  
For the Three Months Ended
June 30, 2018
 
  
Balances prior to
Adoption of
ASU 2017-11
  
Balances after the
Adoption of
ASU 2017-11
  
Effect of Adoption
Higher/(Lower)
 
Statement of Operations
         
Change in fair value of warrant liability loss
 
$
(263
)
 
$
(23
)
 
$
(240
)
Balance Sheet
            
Fair value of warrant liability
 
$
289
  
$
25  
$
(264
)

  
For the Six Months Ended
June 30, 2018
 
  
Balances prior to
Adoption of
ASU 2017-11
  
Balances after the
Adoption of
ASU 2017-11
  
Effect of Adoption
Higher/(Lower)
 
Statement of Operations
         
Change in fair value of warrant liability loss
 
$
(222
)
 
$
(22
)
 
$
(200
)
Balance Sheet
            
Fair value of warrant liability
 
$
289
  
$
25  
$
(264
)