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FAIR VALUE ACCOUNTING (Tables)
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
The following tables set forth the fair value of the Company's assets and liabilities measured at fair value on a recurring basis (at least annually) by level within the fair value hierarchy as of September 30, 2019. As required by accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.
As of September 30, 2019, the fair values of cash and cash equivalents, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments.
 
Level 1
 
Level 2
 
Level 3
 
Total
Investments at fair value
$
321

 
$

 
$

 
$
321

Marketable equity securities
718

 

 

 
718

Marketable debt securities

 
7,058

 

 
7,058

Warrant liabilities
3,177

 


 

 
3,177

Convertible debentures
15,909

 

 

 
15,909

 
$
20,125

 
$
7,058

 
$

 
$
27,183