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Marketable Investment Securities | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Marketable Investment Securities | (3) Marketable Investment Securities The Company has classified its marketable investment securities as available-for-sale securities, all of which are debt securities. These securities are carried at fair value with unrealized holding gains and losses, net of the related tax effect, included in accumulated other comprehensive income (loss) in stockholders’ equity until realized. Gains and losses on investment security transactions are reported on the specific-identification method. Dividend income is recognized on the ex-dividend date and interest income is recognized on an accrual basis. The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities by major security type and class of security at December 31, 2021 and 2020 were as follows: Schedule of Available-for-Sale Securities
December 31, 2021 |  | Amortized Cost |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Aggregate fair value |
Government treasury bills |  | $ | 5,526,122 |  |  | $ | - |  |  | $ | (10,202 | ) |  | $ | 5,515,920 |
Corporate bonds, notes and commercial paper |  |  | 38,181,099 |  |  |  | - |  |  |  | (7,814 | ) |  |  | 38,173,285 |
|  | $ | 43,707,221 |  |  | $ | - |  |  | $ | (18,016 | ) |  | $ | 43,689,205 |
December 31, 2020 |  | Amortized Cost |  |  | Gross unrealized holding gains |  |  | Gross unrealized holding losses |  |  | Aggregate fair value |
Commercial paper |  | $ | 449,992 |  |  |  | - |  |  |  | - |  |  | $ | 449,992 |
|  | $ | 449,992 |  |  | $ | - |  |  | $ | - |  |  | $ | 449,992 |
LIPOCINE INC. AND SUBSIDIARIES NOTES TO CONSOLIDATED FINANCIAL STATEMENTS DECEMBER 31, 2021 and 2020
(3) | Marketable Investment Securities - (continued)
Maturities of debt securities classified as available-for-sale securities at December 31, 2021 are as follows: Schedule of Maturities of Debt Securities Classified as Available-for-sale Securities
December 31, 2021 |  | Amortized Cost |  |  | Aggregate fair value |
Due within one year |  | $ | 41,680,635 |  |  | $ | 41,667,405 |
Due after one year through two years |  |  | 2,026,586 |  |  |  | 2,021,800 |
|  | $ | 43,707,221 |  |  | $ | 43,689,205 |
There were no sales of marketable investment securities during the years ended December 31, 2021 and 2020 and therefore no realized gains or losses. Additionally, $4.7 million and $10.2 million of marketable investment securities matured during the years ended December 31, 2021 and 2020, respectively. The Company determined there were no other-than-temporary impairments for the years ended December 31, 2021 and 2020.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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