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GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2022 USD ($) item | Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) item | Jul. 31, 2021 USD ($) | Jun. 30, 2021 USD ($)
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | $ 172,019 | $ 124,510 |  |  |  |  |
Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 166,543 | 110,636 |  |  |  |  |
USF and CAF II Programs | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 16,193 | 8,432 |  |  |  |  |
USF and CAF II Programs | US Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 13,432 | 4,342 |  |  |  |  |
USF and CAF II Programs | International Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | $ 2,761 | 4,090 |  |  |  |  |
Universal Service Fund programs |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Number of fund disbursement programs | item | 4 |  |  |  |  |  |
High cost support program | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | $ 3,817 | 4,401 |  |  |  |  |
High cost support program | US Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 1,056 | 311 |  |  |  |  |
High cost support program | International Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 2,761 | 4,090 |  |  |  |  |
CAF II | Grant receivable through December 2025 |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Grants Receivable | 27,700 |  |  |  |  |  |
CAF II | Grant receivable from January 2026 through July 2028 |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Grants Receivable | 8,000 |  |  |  |  |  |
CAF II | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 6,822 | 1,899 |  |  |  |  |
CAF II | US Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 6,822 | 1,899 |  |  |  |  |
Network Connectivity for Eligible Communities |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Cumulative Grant Fund Awards | 28,300 |  |  | $ 27,900 |  |  |
Grant funds awarded during the period | 400 |  |  |  |  |  |
Grants cancelled | 2,100 |  |  |  |  |  |
Construction obligation completed | 15,000 |  |  |  |  |  |
Construction obligation yet to be completed | 11,200 |  |  |  |  |  |
CARES Act |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Cumulative Grant Fund Awards |  |  |  |  | $ 16,300 |  |
Grant funds awarded during the period |  |  |  | 2,400 |  |  |
Grant funds used to offset fixed asset related costs |  |  |  | 18,400 |  |  |
Grant funds used to offset operating expenses |  |  |  | $ 300 |  |  |
CBRS Auction |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Initial term of licenses |  |  | 10 years |  |  |  |
Payment for PALs |  |  | $ 20,400 |  |  |  |
Other Programs | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 5,554 | 2,132 |  |  |  |  |
Other Programs | US Telecom | Communication services |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | 5,554 | $ 2,132 |  |  |  |  |
Vija's annual USF support |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Grants Receivable |  |  |  |  |  | $ 10,900 | $ 16,400
Vija's annual USF support | Grant Receivable June 2022 Through June 2023 |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Grants Receivable | 5,500 |  |  |  |  |  |
RDOF |  |  |  |  |  |  |
GOVERNMENT SUPPORT AND SPECTRUM PROGRAMS |  |  |  |  |  |  |
Revenue | $ 500 |  |  |  |  |  |
Grant funds expected to be awarded |  |  |  |  | $ 20,100 |  |
Grant fund term |  |  |  |  | 10 years |  |
Number of households to receive broadband coverage | item |  |  |  |  | 10,000 |  |

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