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DEFERRED REVENUE AND COSTS (Tables) | 12 Months Ended
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Dec. 31, 2021
DEFERRED REVENUE AND COSTS [ABSTRACT] |
Schedule of deferred revenue and costs | Deferred revenue in the accompanying Consolidated Balance Sheets consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2021 |  | 2020 |
Deferred Revenue - Current | ​ | $ | 95,608 | ​ | $ | 39,956 | ​
Deferred Revenue - Long-term (included in Other long-term liabilities) | ​ |  | 17,078 | ​ |  | 17,434 | ​
Total Deferred Revenue | ​ | $ | 112,686 | ​ | $ | 57,390 | ​
​ Deferred costs in the accompanying Consolidated Balance Sheets consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2021 |  | 2020 |
Deferred Costs - Current (included in Prepaids and other current assets) | ​ | $ | 49,043 | ​ | $ | 25,669 | ​
Deferred Costs - Long-term (included in Other long-term assets) | ​ |  | 14,406 | ​ |  | 18,015 | ​
Total Deferred Costs | ​ | $ | 63,449 | ​ | $ | 43,684 | ​
​ Activity in the Company’s Deferred revenue accounts consists of the following (in thousands):
​ | ​ | ​ | ​ | ​
Balance as of December 31, 2020 | ​ | $ | 57,390 | ​
Additions | ​ |  | 297,623 | ​
Amortization | ​ |  | (242,327) | ​
Balance as of December 31, 2021 | ​ | $ | 112,686 | ​

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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