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Other long-term liabilities
9 Months Ended
Sep. 30, 2021
Other long-term liabilities [Abstract]  
Other long-term liabilities

11.
Other long-term liabilities:


Other long-term liabilities as of September 30, 2021 mainly include an amount of $940,972, being the non-current portion of a total accrued warranty reserve of $1,068,076. We accrue a warranty reserve of 8% of the sale price of the fuel cells sold. Warranty reserve is released when repairs or replacements are carried out in relation to items under warranties or when the warranty period for the fuel cell expires. The portion of the warranty reserve expected to be incurred within the next 12 months is included within Other current liabilities (Note 10), while the remaining balance is included within Other long-term liabilities on the consolidated balance sheets.