9.   Finance Lease ROU Assets

The Company assumed three equipment leases as part of the RubrYc asset acquisition (see Note 6 – Significant Transactions). In addition, the Company leased a mobile office trailer which was classified as part of assets held for sale prior to its termination. The mobile office trailer lease was terminated in December 2022. See Note 14 – Finance Lease Obligations for more details of the terms of the leases.

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The following table summarizes by category the gross carrying value and accumulated amortization of finance lease ROU (in thousands):

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Amortization of finance lease ROU assets was approximately $67,000 and $68,000 for the three months ended March 31, 2024 and 2023, respectively. Amortization of finance lease ROU assets approximately $203,000 and $136,000 for the nine months ended March 31, 2024 and 2023, respectively.