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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Schedule of Other Income, Net
Other Income, Net
 
Three Months Ended March 31,
(In thousands)
2020
 
2019
Change in fair value of warrants liability
$
4,651

 
$

Change in fair value of financing derivatives
2,387

 
4,100

Change in fair value of investment in equity securities

 
(1,712
)
Other
156

 
581

Total other income, net
$
7,194

 
$
2,969


Schedule of Common Stock Equivalents for Securities Outstanding Excluded from Earnings Per Share Calculations
The following is a summary of the Common Stock equivalents for the securities outstanding during the respective periods that have been excluded from the computation of diluted net loss per common share, as their effect would be anti-dilutive:
 
Three Months Ended March 31,
 
2020
 
2019
Stock options, stock appreciation rights, restricted stock units, deferred stock units, senior secured convertible notes and warrants
16,986,614

 
8,100,585


Schedule of the Allowance for Doubtful Accounts
The following is a summary of the allowance for doubtful accounts:
 
 
Three Months Ended March 31,
(In thousands)
 
2020
 
2019
Beginning Balance
 
$
(1,919
)
 
$
(1,597
)
Additions
 
(492
)
 
138

Recoveries
 
(44
)
 
(241
)
Write-offs
 
308

 
17

Ending Balance
 
$
(2,147
)
 
$
(1,683
)