Annual report pursuant to Section 13 and 15(d)

Income taxes (Schedule of Deferred Tax Assets and (Liabilities)) (Details)

v3.22.0.1
Income taxes (Schedule of Deferred Tax Assets and (Liabilities)) (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred income tax assets:    
Net operating loss carryforwards $ 64,394 $ 51,938
Research and development credit carryforwards 1,063 1,063
Long-term investments 3,402
Operating lease liabilities 1,454
Stock option expense 15,827 1,253
Impairment of mining related assets and other 10,504 803
Total deferred tax assets 96,644 55,057
Valuation allowance (59,039) (55,057)
Net deferred tax assets 37,605
Deferred income tax liabilities:    
Derivative asset (5,477)
Property and equipment and other (32,128)
Net deferred tax assets (liabilities)