Derivative at Fair Value	12 Months Ended
Dec. 31, 2019
Derivative at Fair Value
Derivative at Fair Value	9.Derivative at Fair Value On December 3, 2019 the Company entered into an amendment to the plant lease agreement with Hecla, reducing the variable per tonne fee contained in the lease agreement from $22.00 to $11.00. Under certain silver price and delivered ore head grade limits, as fully discussed in Note 18, the variable per tonne fee could be increased back to the previous $22.00 per tonne. Pursuant to ASC Topics 815-Derivatives and Hedging (“ASC 815”) and 842-Leases (“ASC 842”), arrangements with variable lease payments must be evaluated to assess whether they contain embedded derivatives. If embedded derivatives are not “clearly and closely related” to the lease contract, they must be bifurcated and accounted for separately from the host contract. The Company determined that the potential for the Company to receive an additional $11.00 variable per tonne fee if certain conditions relating to the silver price and delivered ore head grades are met does not qualify for the “clearly and closely related” exception, and as a result, the potential additional $11.00 variable per tonne fee constitutes a derivative that must be valued and accounted for apart from the host lease contract. Per the guidance of ASC 842, the Company has determined that the amendment to the lease agreement constituted a modification that must be accounted for as a new lease commencing on December 2, 2019, the date the amendment was agreed upon by both parties, and expiring on December 31, 2020. The Company is treating the fair value of the derivative received at the time of the modification to the lease agreement as an upfront lease payment that will be amortized over the remaining life of the lease on a straight line basis (see Note 15 for a discussion of the valuation method used to compute the fair value of the derivative). At December 2, 2019, the Company had recorded a “Derivative at fair value” asset and “Deferred Revenue” of approximately $194,000 on the Consolidated Balance Sheet related to the amended lease agreement. At December 31, 2019 the company recognized additional “Revenue - plant lease” on the Company’s Consolidated Statements of Operations and an increase to the derivative of approximately $59,000 related to the change in the fair value of the derivative between the December 2, 2019 amendment date and December 31, 2019. The Company also recognized approximately $15,000 “Revenue - plant lease” on the Company’s Consolidated Statements of Operations related to the amortization of the deferred revenue.

9.Derivative at Fair Value

On December 3, 2019 the Company entered into an amendment to the plant lease agreement with Hecla, reducing the variable per tonne fee contained in the lease agreement from $22.00 to $11.00. Under certain silver price and delivered ore head grade limits, as fully discussed in Note 18, the variable per tonne fee could be increased back to the previous $22.00 per tonne. Pursuant to ASC Topics 815-Derivatives and Hedging (“ASC 815”) and 842-Leases (“ASC 842”), arrangements with variable lease payments must be evaluated to assess whether they contain embedded derivatives. If embedded derivatives are not “clearly and closely related” to the lease contract, they must be bifurcated and accounted for separately from the host contract. The Company determined that the potential for the Company to receive an additional $11.00 variable per tonne fee if certain conditions relating to the silver price and delivered ore head grades are met does not qualify for the “clearly and closely related” exception, and as a result, the potential additional $11.00 variable per tonne fee constitutes a derivative that must be valued and accounted for apart from the host lease contract. Per the guidance of ASC 842, the Company has determined that the amendment to the lease agreement constituted a modification that must be accounted for as a new lease commencing on December 2, 2019, the date the amendment was agreed upon by both parties, and expiring on December 31, 2020. The Company is treating the fair value of the derivative received at the time of the modification to the lease agreement as an upfront lease payment that will be amortized over the remaining life of the lease on a straight line basis (see Note 15 for a discussion of the valuation method used to compute the fair value of the derivative). At December 2, 2019, the Company had recorded a “Derivative at fair value” asset and “Deferred Revenue” of approximately $194,000 on the Consolidated Balance Sheet related to the amended lease agreement. At December 31, 2019 the company recognized additional “Revenue - plant lease” on the Company’s Consolidated Statements of Operations and an increase to the derivative of approximately $59,000 related to the change in the fair value of the derivative between the December 2, 2019 amendment date and December 31, 2019. The Company also recognized approximately $15,000 “Revenue - plant lease” on the Company’s Consolidated Statements of Operations related to the amortization of the deferred revenue.