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REVENUE AND RECEIVABLES (Tables) | 12 Months Ended
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Dec. 31, 2024
REVENUE AND RECEIVABLES |
Summary of revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31, 2024
​ | International | ​ | US | ​ | ​ | ​
​ | Telecom | ​ | Telecom | ​ | Total
Services transferred over time | $ | 356,564 | ​ | $ | 290,335 | ​ | $ | 646,899
Goods and services transferred at a point in time | ​ | 14,944 | ​ | ​ | 12,154 | ​ | ​ | 27,098
Total revenue accounted for under ASC 606 | $ | 371,508 | ​ | $ | 302,489 | ​ | $ | 673,997
Operating lease income | ​ | 381 | ​ | ​ | 7,991 | ​ | ​ | 8,372
Government grant revenue (1) | ​ | 5,574 | ​ | ​ | 41,132 | ​ | ​ | 46,706
Total revenue | $ | 377,463 | ​ | $ | 351,612 | ​ | $ | 729,075
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31, 2023
​ | International | ​ | US | ​ | ​ | ​
​ | Telecom | ​ | Telecom | ​ | Total
Services transferred over time | $ | 347,769 | ​ | $ | 326,966 | ​ | $ | 674,735
Goods and services transferred at a point in time | ​ | 17,086 | ​ | ​ | 18,059 | ​ | ​ | 35,145
Total revenue accounted for under ASC 606 | $ | 364,855 | ​ | $ | 345,025 | ​ | $ | 709,880
Operating lease income | ​ | 289 | ​ | ​ | 7,488 | ​ | ​ | 7,777
Government grant revenue (1) | ​ | 5,589 | ​ | ​ | 38,970 | ​ | ​ | 44,559
Total revenue | $ | 370,733 | ​ | $ | 391,483 | ​ | $ | 762,216
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31, 2022
​ | International | ​ | US | ​ | ​ | ​
​ | Telecom | ​ | Telecom | ​ | Total
Services transferred over time | $ | 332,507 | ​ | $ | 301,309 | ​ | $ | 633,816
Goods and services transferred at a point in time | ​ | 14,934 | ​ | ​ | 29,203 | ​ | ​ | 44,137
Total revenue accounted for under ASC 606 | $ | 347,441 | ​ | $ | 330,512 | ​ | $ | 677,953
Operating lease income | ​ | 278 | ​ | ​ | 5,975 | ​ | ​ | 6,253
Government grant revenue (1) | ​ | 7,862 | ​ | ​ | 33,677 | ​ | ​ | 41,539
Total revenue | $ | 355,581 | ​ | $ | 370,164 | ​ | $ | 725,745
​
| (1) | Revenue recognized from government funded programs. Refer to Note 9.
Summary of contracts asset and liabilities | Contract assets and liabilities consisted of the following (amounts in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | December 31, 2024 | ​ | December 31, 2023 | ​ | ​ | $ Change | ​ | % Change
Contract asset – current | $ | 3,920 | ​ | $ | 3,616 | ​ | $ | 304 | ​ | ​ | 8.4 | %
Contract asset – noncurrent | ​ | 5,368 | ​ | ​ | 5,509 | ​ | ​ | (141) | ​ | ​ | (2.6) | %
Contract liability – current | ​ | (28,932) | ​ | ​ | (30,990) | ​ | ​ | 2,058 | ​ | ​ | (6.6) | %
Contract liability – noncurrent | ​ | (55,116) | ​ | ​ | (64,035) | ​ | ​ | 8,919 | ​ | ​ | (13.9) | %
Net contract liability | $ | (74,760) | ​ | $ | (85,900) | ​ | $ | 11,140 | ​ | ​ | (13.0) | %
Schedule of activity in allowances for credit losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2024 |  | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period |  | $ | 16,362 | ​ | $ | 15,171
Current period provision for expected losses |  | ​ | 5,946 | ​ | ​ | 5,012
Write-offs charged against the allowance |  | ​ | (7,494) | ​ | ​ | (4,340)
Recoveries collected | ​ | ​ | 318 | ​ | ​ | 519
Balance at end of period | ​ | $ | 15,132 | ​ | $ | 16,362
​

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