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Investments	3 Months Ended
Mar. 31, 2021
Investments
Investments	5. Investments We did not have any investments as of March 31, 2021. As of December 31, 2020, our investments consisted of certificates of deposit with various financial institutions with original maturities of six to nine months. Investments are classified as short- or long-term investments on our balance sheets based on original maturity. Certificates of deposits were classified as held-to-maturity and were recorded at amortized cost, which approximated fair value. We have never experienced a credit loss on the principal or interest receivable of our cash equivalents or short-term investments. Our certificates of deposit are each individually and fully insured by the federal Depsot Insurance Company (FDIC). Accordingly, we did not record any allowance for potential credit losses as of December 31, 2020.

Investments

3 Months Ended

Mar. 31, 2021

5. Investments

We did not have any investments as of March 31, 2021. As of December 31, 2020, our investments consisted of certificates of deposit with various financial institutions with original maturities of six to nine months. Investments are classified as short- or long-term investments on our balance sheets based on original maturity. Certificates of deposits were classified as held-to-maturity and were recorded at amortized cost, which approximated fair value. We have never experienced a credit loss on the principal or interest receivable of our cash equivalents or short-term investments. Our certificates of deposit are each individually and fully insured by the federal Depsot Insurance Company (FDIC). Accordingly, we did not record any allowance for potential credit losses as of December 31, 2020.