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THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2022
THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Schedule of Fair Value Measurements on Recurring and Non-recurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2022
(thousands of dollars) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Current assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalent: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market account | ​ | $ | 68,676 | ​ | $ | — | ​ | $ | — | ​ | $ | 68,676
Total current assets recorded at fair value | ​ | $ | 68,676 | ​ | $ | — | ​ | $ | — | ​ | $ | 68,676
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
(thousands of dollars) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Current assets |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Cash equivalent: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Money market account | ​ | $ | 109,883 | ​ | $ | — | ​ | $ | — | ​ | $ | 109,883
Total current assets recorded at fair value | ​ | $ | 109,883 | ​ | $ | — | ​ | $ | — | ​ | $ | 109,883
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2021
(thousands of dollars) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Non-current Assets | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Land grant | ​ | $ | — | ​ | $ | — | ​ | $ | 1,378 | ​ | $ | 1,378
Total non-current assets recorded at fair value | ​ | $ | — | ​ | $ | — | ​ | $ | 1,378 | ​ | $ | 1,378
Non-current Liabilities | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Land grant obligation | ​ | $ | — | ​ | $ | — | ​ | $ | (1,378) | ​ | $ | (1,378)
Total non-current liabilities recorded at fair value | ​ | $ | — | ​ | $ | — | ​ | $ | (1,378) | ​ | $ | (1,378)
​

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- Definition Tabular disclosure of assets measured at fair value measured on a recurring or nonrecurring basis. Includes, but is not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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