Note 12 - Commitments and Contingencies	6 Months Ended
Jun. 30, 2021
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	*Note 12.* Commitments and Contingencies Office Leases** We have long-term operating leases for office, industrial and laboratory space in Westminster, California, Oak Ridge, Tennessee, and Alberta, Canada. Payments made under operating leases are charged to the Consolidated Statement of Operations and Comprehensive Loss on a straight-line basis over the term of the operating lease agreement. For the six months ended June 30, 2021 and 2020, rental expense was $113,000 and $114,000, respectively. As of June 30, 2021, our weighted average remaining lease term is three years and the total remaining operating lease payments is $434,000. On January 1, 2019, we adopted ASC 842 which resulted in a right-of-use asset and lease liability. Short-term leases are not included in our analysis. The adoption resulted in an immaterial cumulative effect of an accounting change that was not recorded. The lease of our Westminster facility qualifies for the new treatment; it originated in August 2016, was originally scheduled to expire August 2020, contains a yearly escalation of 3%, and includes a four-year renewal option whereby the base rent is adjusted to then market value. During 2020, we exercised our option to extend the lease for four years. It is too early for management to determine if it will extend another four years, therefore the additional four-year extension is not included in the analysis. The lease of our Oak Ridge, Tennessee facility also qualifies, and it had one three-year extension to September 2022, and has one renewal option for another five years where the rental rate would adjust to greater of the current price and fair market value. No determination has been made whether to exercise the five-year renewal option for the Oak Ridge facility. The lease of our Canadian facility is less than one year. None of our leases have additional terms related to the payments or mechanics of the lease. The leases have no additional payment terms such as common area maintenance payments, tax sharing payments or other allocable expenses. Likewise, the leases do not contain other terms and conditions of use, such as variable lease payments, residual value guaranties or other restrictive financial terms. Since there is no explicit interest rate in our leases, management used its incremental borrowing rate, which is estimated to be 18% to determine lease liability.

Note 12 - Commitments and Contingencies

6 Months Ended

Jun. 30, 2021

Commitments and Contingencies Disclosure [Text Block]

Note 12. Commitments and Contingencies

Office Leases

We have long-term operating leases for office, industrial and laboratory space in Westminster, California, Oak Ridge, Tennessee, and Alberta, Canada. Payments made under operating leases are charged to the Consolidated Statement of Operations and Comprehensive Loss on a straight-line basis over the term of the operating lease agreement. For the six months ended June 30, 2021 and 2020, rental expense was $113,000 and $114,000, respectively. As of June 30, 2021, our weighted average remaining lease term is three years and the total remaining operating lease payments is $434,000.

On January 1, 2019, we adopted ASC 842 which resulted in a right-of-use asset and lease liability. Short-term leases are not included in our analysis. The adoption resulted in an immaterial cumulative effect of an accounting change that was not recorded. The lease of our Westminster facility qualifies for the new treatment; it originated in August 2016, was originally scheduled to expire August 2020, contains a yearly escalation of 3%, and includes a four-year renewal option whereby the base rent is adjusted to then market value. During 2020, we exercised our option to extend the lease for four years. It is too early for management to determine if it will extend another four years, therefore the additional four-year extension is not included in the analysis. The lease of our Oak Ridge, Tennessee facility also qualifies, and it had one three-year extension to September 2022, and has one renewal option for another five years where the rental rate would adjust to greater of the current price and fair market value. No determination has been made whether to exercise the five-year renewal option for the Oak Ridge facility. The lease of our Canadian facility is less than one year. None of our leases have additional terms related to the payments or mechanics of the lease. The leases have no additional payment terms such as common area maintenance payments, tax sharing payments or other allocable expenses. Likewise, the leases do not contain other terms and conditions of use, such as variable lease payments, residual value guaranties or other restrictive financial terms. Since there is no explicit interest rate in our leases, management used its incremental borrowing rate, which is estimated to be 18% to determine lease liability.