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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) | 6 Months Ended
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Jun. 30, 2021
USM | Fixed price contract |
Revenue recognition |
Payment terms | 30-day
Whole asset sales | Fixed price contract |
Revenue recognition |
Payment terms | Payment is required in full
Leasing |
Revenue recognition |
Payment terms | due upon receipt

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- Definition Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130554-203045 + Details
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- Details
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