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Other Income and Expense Other Income and Expense
 6 Months Ended
Jun. 30, 2020
Other Income and Expenses [Abstract]  
Other Income and Expense Other Income and Expense

Other income (expense) net consisted of the following:

 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2020
 
2019
 
2020
 
2019
Change in estimated fair value of contingent forward
$
351,091

 
$
—

 
$
1,413,382

 
$
—

Interest expense
(91,656
)
 
(181,907
)
 
(142,244
)
 
(643,045
)
 
 
 
 
 
 
 
 
Interest income
179,558

 
13,239

 
186,026

 
62,275

Mining lease income
10,000

 
—

 
20,000

 
—

Unrealized gain on Tonogold shares
1,620,929

 
—

 
1,335,929

 
—

Realized gain on sale of Tonogold shares
23,740

 
—

 
23,740

 
—

Preferred shares issuance cost
—

 
(432,000
)
 
—

 
(432,000
)
Make whole obligations
198,487

 
(34,946
)
 
162,711

 
100,216

Recognition of PPP proceeds
193,546

 
—

 
193,546

 
—

Gain on sale of assets and mining claims
—

 
6,250

 
100,000

 
6,250

Reimbursement from Tonogold
—

 
—

 
150,000

 
—

All other
1,228

 
4,998

 
2,502

 
15,728

Total other income (expense)
2,227,488

 
(442,459
)
 
2,174,454

 
(247,531
)
Total other income (expense), net
$
2,486,923

 
$
(624,366
)
 
$
3,445,592

 
$
(890,576
)