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REVENUE AND RECEIVABLES (Tables) | 12 Months Ended
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Dec. 31, 2022
REVENUE AND RECEIVABLES |
Summary of revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | 2022 | ​ | ​ | 2021 | ​ | ​ | 2020
Services transferred over time | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
US Telecom | $ | 301,309 | ​ | $ | 188,405 | ​ | $ | 96,935
International Telecom | ​ | 332,507 | ​ | ​ | 319,357 | ​ | ​ | 305,844
Solar | ​ | — | ​ | ​ | 418 | ​ | ​ | 4,556
Total services transferred over time | ​ | 633,816 | ​ | ​ | 508,180 | ​ | ​ | 407,335
Goods and services transferred at a point in time | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
US Telecom | ​ | 29,203 | ​ | ​ | 46,433 | ​ | ​ | 12,154
International Telecom | ​ | 14,934 | ​ | ​ | 10,928 | ​ | ​ | 9,196
Total goods and services transferred at a point in time | ​ | 44,137 | ​ | ​ | 57,361 | ​ | ​ | 21,350
Total revenue accounted for under ASC 606 | ​ | 677,953 | ​ | ​ | 565,541 | ​ | ​ | 428,685
Summary of contracts asset and liabilities | Contract assets and liabilities consisted of the following (amounts in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | December 31, 2022 | ​ | December 31, 2021 | ​ | ​ | $ Change | ​ | % Change
Contract asset – current | $ | 2,932 | ​ | $ | 4,805 | ​ | $ | (1,873) | ​ | (39) | %
Contract asset – noncurrent | ​ | 3,775 | ​ | ​ | 900 | ​ | ​ | 2,875 | ​ | 319 | %
Contract liability – current | ​ | (27,284) | ​ | ​ | (25,332) | ​ | ​ | (1,952) | ​ | (8) | %
Contract liability – noncurrent | ​ | (72,543) | ​ | ​ | (81,391) | ​ | ​ | 8,848 | ​ | 11 | %
Net contract liability | $ | (93,120) | ​ | $ | (101,018) | ​ | $ | 7,898 | ​ | 8 | %
Schedule of activity in allowances for credit losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year ended December 31, 2022 |  | Year ended December 31, 2021
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period |  | $ | 13,885 | ​ | $ | 12,121
Current period provision for expected losses |  | ​ | 6,695 | ​ | ​ | 4,850
Write-offs charged against the allowance |  | ​ | (5,518) | ​ | ​ | (3,517)
Recoveries collected | ​ | ​ | 109 | ​ | ​ | 431
Balance at end of period | ​ | $ | 15,171 | ​ | $ | 13,885

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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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 https://asc.fasb.org/extlink&oid=126920106&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045 + Details
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