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The Company (Tables)
 9 Months Ended
Sep. 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). There were no such warrants outstanding as of September 30, 2019 and no gain or loss in the three and nine months ended September 30, 2019.
 
Issuance Date
 
January 1, 2018
  
Increase in
Fair Value
  
September 30, 2018
 
October 31, 2013
 
$
2
  
$
51
  
$
53
 
February 5, 2014
  
1
   
50
   
51
 
  
$
3
  
$
101
  
$
104
 
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 nine months ended September 30, 2019 and 2018:
 
  
Three Months Ended
September 30, 2019
  
Nine Months Ended
September 30, 2019
 
  
Common Stock
  
Series C
Convertible Preferred Stock
  
Common Stock
  
Series C
Convertible Preferred Stock
 
             
Loss attributable to each class
 
$
(840
)
 
$
(20
)
 
$
(3,079
)
 
$
(196
)
                 
Weighted average number of shares outstanding during the period
  
32,903,287
   
2,105
   
31,663,355
   
5,412
 
                 
Basic and Diluted loss per share
 
$
(0.03
)
 
$
(9.58
)
 
$
(0.10
)
 
$
(36.14
)

  
Three Months Ended
September 30, 2018
  
Nine Months Ended
September 30, 2018
 
  
Common Stock
  
Series C
Convertible Preferred Stock
  
Common Stock
  
Series C
Convertible Preferred Stock
 
Loss attributable to each class
 
$
(539
)
 
$
(69
)
 
$
(2,784
)
 
$
(1,534
)
                 
Weighted average number of shares outstanding during the period
  
29,912,827
   
10,049
   
16,099,752
   
23,872
 
                 
Basic and Diluted  loss per share
 
$
(0.02
)
 
$
(6.82
)
 
$
(0.17
)
 
$
(64.27
)
Antidilutive Securities Excluded from Computation of Earnings Per Share
The weighted average of potential common stock equivalents outstanding during the three and nine months ended September 30, 2019 and 2018 have been excluded from the loss per share calculation as their inclusion would have been anti-dilutive:
 
  
Three Months Ended
September 30,
  
Nine Months Ended
September 30,
 
 
 
2019
  
2018
  
2019
  
2018
 
Common stock purchase warrants
  
1,073,319
   
2,392,760
   
1,776,216
   
2,398,651
 
Restricted stock units
  
120,773
   
140,097
   
123,675
   
58,717
 
Common stock options
  
4,033,038
   
4,371,764
   
4,178,663
   
2,786,400
 
Total
  
5,227,130
   
6,904,621
   
6,078,554
   
5,243,768
 
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 consolidated balance sheets and condensed consolidated statements of operations as of and for the following periods is as follows:
 
  
For the Three Months Ended
September 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
 
$
(1,053
)
 
$
(79
)
 
$
(974
)
Balance Sheet
            
Fair value of warrant liability
 
$
1,342
  
$
104
  
$
(1,238
)

  
For the Nine Months Ended
September 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
 
$
(1,275
)
 
$
(101
)
 
$
(1,174
)
Balance Sheet
            
Fair value of warrant liability
 
$
1,342
  
$
104
  
$
(1,238
)