Quarterly report pursuant to Section 13 or 15(d)

Amortization expense for the three months ended June 30, 2021 and 2020 was $73,000 and $72,000, respectively. Amortization expense for the six months ended June 30, 2021 and 2020 was $147,000 and $144,000, respectively. Future amortization of intangible a

v3.21.2
Amortization expense for the three months ended June 30, 2021 and 2020 was $73,000 and $72,000, respectively. Amortization expense for the six months ended June 30, 2021 and 2020 was $147,000 and $144,000, respectively. Future amortization of intangible a (Details)
Jun. 30, 2021
USD ($)
Patents  
2022 $ 296,000
2023 296,000
2024 126,000
2025 86,000
2026 and thereafter 694,000
Total $ 1,498,000