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Equity - Reconciliation of Stock-based Transactions (Details) - shares
12 Months Ended
Dec. 30, 2020
Nov. 29, 2019
Dec. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (in shares)     27,236,489 15,067,655
Equity issue agreements (in shares)     5,747,608 5,941,670
Issuance of common stock for convertible preferred (in shares)     0 2,240,441
Private placement agreements (in shares)     0 1,833,332
Reverse split fractional shares (in shares)   9,114 0 9,114
Common stock issuance costs (in shares)     173,611 498,008
Purchase of mineral rights (in shares)     343,058 746,269
Investment in Mercury Clean Up LLC (in shares)     625,000 900,000
Director compensation (in shares)     315,000 0
Director restricted stock grants (in shares) 540,000     0
Total shares issued (in shares)     7,744,277 12,168,834
Ending balance (in shares)     34,980,766 27,236,489