which we operate contain similar provisions and limitations. All of the remaining federal and state NOLs as of September 30, 2021 are subject to annual limitations due to the February 2010 ownership change.
Management assesses the available positive and negative evidence to estimate if sufficient future taxable income will be generated to utilize the existing deferred tax assets. Given our current earnings and anticipated future earnings, we determine there is sufficient evidence to reach a conclusion that a valuation allowance is not warranted.
Note 7 – Commitments and Contingencies
Lease Agreements
We lease facilities under non-cancellable operating leases. The leases expire at various dates through fiscal 2023 and frequently include renewal provisions for varying periods of time, provisions which require us to pay taxes, insurance and maintenance costs, and provisions for minimum rent increases. Minimum leases payments, including scheduled rent increases are recognized as rent expenses on a straight-line basis over the term of the lease.
The rate implicit in each lease is not readily determinable, and we therefore use our incremental borrowing rate to determine the present value of the lease payments. The weighted average incremental borrowing rate used to determine the initial value of ROU assets and lease liabilities capitalized during the nine months ended September 30, 2021 and 2020 was 5.50% and 6.75%, respectively.
ROU assets for operating leases are periodically reduced by impairment losses. We use the long-lived assets impairment guidance in ASC Subtopic 360-10, Property, Plant and Equipment – Overall, to determine whether a ROU asset is impaired, and if so, the amount of the impairment loss to recognize. As of September 30, 2021, we have not recognized any impairment losses for our ROU assets.
We monitor for events or changes in circumstances that require a reassessment of our leases. When a reassessment results in the remeasurement of a lease liability, a corresponding adjustment is made to the carrying amount of the corresponding ROU asset unless doing so would reduce the carrying amount of the ROU asset to an amount less than zero. In that case, the amount of the adjustment that would result in a negative ROU asset balance is recorded in profit or loss.
In June 2020, the Company entered into a sublease agreement to lease 4,351 square feet of space located in Irvine, California for approximately $6 thousand per month with 3 percent annual increases, plus common area maintenance costs. The lease term began July 1, 2020 and ends May 31, 2023. The space is used for executive offices, sales, finance and administration.
The Company leases a 14,476 square-foot manufacturing facility and administrative office in Shenzhen, China. In May 2020, the Company renewed this lease for the period June 1, 2020 through May 31, 2022 for approximately $7 thousand per month through May 31, 2021 and increasing to approximately $8 thousand per month through May 31, 2022.
The Company leases a 275 square-foot engineering and administrative office in Singapore for approximately $1 thousand per month. This lease term ends May 2022.
The Company leases a 3,000 square-foot distribution facility in Hong Kong for approximately $2 thousand per month. This lease term ends April 2023.
The Company leases a 500 square-foot sales office in Tokyo, Japan for approximately $1 thousand per month. This lease term ends November 2022.
As of September 30, 2021, the Company had current and long-term lease liabilities of $150 thousand and $71 thousand, respectively, and ROU assets of $207 thousand. As of December 31, 2020, the Company had current and long-term lease liabilities of $219 thousand and $140 thousand, respectively, and ROU assets of $334 thousand. Future imputed interest as of September 30, 2021 totaled $10 thousand. The weighted average remaining lease term of the Company’s leases as of September 30, 2021 is 0.8 years.