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REVENUE RECOGNITION AND RECEIVABLES (Tables) | 9 Months Ended
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Sep. 30, 2023
REVENUE RECOGNITION AND RECEIVABLES |
Summary of revenues | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three months ended | ​ | Nine months ended
​ | ​ | September 30, 2023 | September 30, 2022 | ​ | September 30, 2023 | ​ | September 30, 2022
Services transferred over time | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
US Telecom | $ | 81,459 | ​ | $ | 76,542 | ​ | $ | 242,862 | ​ | $ | 221,033
International Telecom | ​ | 87,657 | ​ | ​ | 84,770 | ​ | ​ | 260,066 | ​ | ​ | 248,552
Total | ​ | 169,116 | ​ | ​ | 161,312 | ​ | ​ | 502,928 | ​ | ​ | 469,585
Goods and services transferred at a point in time | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
US Telecom | ​ | 4,111 | ​ | ​ | 5,839 | ​ | ​ | 9,255 | ​ | ​ | 18,140
International Telecom | ​ | 4,752 | ​ | ​ | 4,294 | ​ | ​ | 11,792 | ​ | ​ | 10,181
Total | ​ | 8,863 | ​ | ​ | 10,133 | ​ | ​ | 21,047 | ​ | ​ | 28,321
Total revenue accounted for under ASC 606 | $ | 177,979 | ​ | $ | 171,445 | ​ | $ | 523,975 | ​ | $ | 497,906
Summary of contracts asset and liabilities | Contract assets and liabilities consisted of the following (amounts in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | September 30, 2023 | ​ | December 31, 2022 | ​ | ​ | $ Change | ​ | % Change
Contract asset – current | $ | 3,241 | ​ | $ | 2,932 | ​ | $ | 309 | ​ | ​ | 10.5 | %
Contract asset – noncurrent | ​ | 4,050 | ​ | ​ | 3,775 | ​ | ​ | 275 | ​ | ​ | 7.3 | %
Contract liability – current | ​ | (29,872) | ​ | ​ | (27,284) | ​ | ​ | (2,588) | ​ | ​ | 9.5 | %
Contract liability – noncurrent | ​ | (65,848) | ​ | ​ | (72,543) | ​ | ​ | 6,695 | ​ | ​ | (9.2) | %
Net contract liability | $ | (88,429) | ​ | $ | (93,120) | ​ | $ | 4,691 | ​ | ​ | (5.0) | %
Schedule of activity in allowances for credit losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Nine months ended
​ |  | September 30, 2023 |  | September 30, 2022
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period |  | $ | 15,171 | ​ | $ | 13,885
Current period provision for expected losses |  | ​ | 4,014 | ​ | ​ | 4,969
Write-offs charged against the allowance |  | ​ | (3,017) | ​ | ​ | (3,083)
Recoveries collected | ​ | ​ | 414 | ​ | ​ | 326
Balance at end of period | ​ | $ | 16,582 | ​ | $ | 16,097
​

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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 -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + 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 -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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