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Short-Term and Long-Term Investments | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Short-Term and Long-Term Investments | 4. SHORT-TERM AND LONG-TERM INVESTMENTS As of December 31, 2021 and 2020, the Company held $45,215,000 and $50,166,000 , respectively, of short-term investments, consisting of obligations of the U.S. Treasury, all of which were debt securities with original maturities greater than three months but less than one year at the time of purchase. As of December 31, 2021 and 2020, the Company held one auction rate security with a par value of $3,000,000 and an estimated fair value of approximately $2,639,000 , and $2,517,000, respectively, purchased through and held in custody by a broker-dealer affiliate of Bank of America, N.A., that has experienced failed auctions (the “Failed Auction Security”) since February 2008. The Failed Auction Security held by the Company is Aaa/AA+ rated by major credit rating agencies, is collateralized by student loans, and is guaranteed by the U.S. Department of Education under the Federal Family Education Loan Program. Management is not aware of any reason to believe the issuer of the Failed Auction Security is presently at risk of default. Through December 31, 2021, the Company has continued to receive interest payments on the Failed Auction Security in accordance with the terms of its indenture. Management believes the Company ultimately should be able to liquidate the Failed Auction Security without significant loss primarily due to the overall quality of the issue held and the collateral securing the substantial majority of the underlying obligation. Changes in the estimated fair value of the Failed Auction Security have not been significant in the past three years. However, current conditions in the auction rate securities market have led management to conclude the recovery period for the Failed Auction Security exceeds 12 months. As a result, the Company continued to classify the Failed Auction Security as long-term as of December 31, 2021. At this time, the Company has no intent to sell the Failed Auction Security and does not believe it is more likely than not the Company will be required to sell the security. If current market conditions deteriorate further, the Company may be required to record additional unrealized losses. If the credit rating of the security deteriorates, the Company may be required to adjust the carrying value of the investment through impairment charges recorded in the Consolidated Statement of Operations, and any such impairment adjustments may be material. Details of our investments are as follows (in thousands):
|  | December 31, 2021 |
|  | Cash and Cash Equivalents |  |  | Short-Term Investments |  |  | Long-Term Investments |
Measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  | $ | 94,282 |  |  | $ | — |  |  | $ | — |
U.S. Treasury Obligations |  |  | — |  |  |  | 45,215 |  |  |  | — |
Failed Auction Security |  |  | — |  |  |  | — |  |  |  | 2,639 |
Total |  |  | 94,282 |  |  |  | 45,215 |  |  |  | 2,639 |
Other measurement basis: |  |  |  |  |  |  |  |  |  |  |  |
Cash on hand |  |  | 88,136 |  |  |  | — |  |  |  | — |
Total |  | $ | 182,418 |  |  | $ | 45,215 |  |  | $ | 2,639 |
|  | December 31, 2020 |
|  | Cash and Cash Equivalents |  |  | Short-Term Investments |  |  | Long-Term Investments |
Measured at fair value: |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Money Market Funds |  | $ | 69,493 |  |  | $ | — |  |  | $ | — |
U.S. Treasury Obligations |  |  | 19,998 |  |  |  | 50,166 |  |  |  | — |
Failed Auction Security |  |  | — |  |  |  | — |  |  |  | 2,517 |
Total |  |  | 89,491 |  |  |  | 50,166 |  |  |  | 2,517 |
Other measurement basis: |  |  |  |  |  |  |  |  |  |  |  |
Cash on hand |  |  | 72,251 |  |  |  | — |  |  |  | — |
Total |  | $ | 161,742 |  |  | $ | 50,166 |  |  | $ | 2,517 |
The following is a summary of the available-for-sale securities (in thousands):
December 31, 2021 |  | Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
U.S. Treasury Obligations |  | $ | 45,238 |  |  | $ | — |  |  | $ | 23 |  |  | $ | 45,215 |
Failed Auction Security |  |  | 3,000 |  |  |  | — |  |  |  | 361 |  |  |  | 2,639 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury Obligations |  | $ | 70,172 |  |  | $ | — |  |  | $ | 8 |  |  | $ | 70,164 |
Failed Auction Security |  |  | 3,000 |  |  |  | — |  |  |  | 483 |  |  |  | 2,517 |
As of December 31, 2021 and 2020, the Failed Auction Security had been in an unrealized loss position for greater than 12 months. The amortized cost and estimated fair value of the available-for-sale securities on December 31, 2021, by type and contractual maturities, are shown below (in thousands):
U.S. Treasury Obligations: |  |  |  |  |  |  |  |
|  | Cost |  |  | Estimated Fair Value |
Maturities greater than three months but less than one year |  | $ | 45,238 |  |  | $ | 45,215 |
Failed Auction Security: |  |  |  |  |  |  |  |
|  | Cost |  |  | Estimated Fair Value |
Due in twenty to forty years |  | $ | 3,000 |  |  | $ | 2,639 |

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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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