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Debt Obligations - Schedule of Other Financing Obligations (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Debt Disclosure [Abstract] |  |
Non-cash residual value of Tucker, Georgia lease | $ 0 | $ 54,676
Future maturities associated with the Tucker, Georgia failed sale-leaseback liability | 0 | 862
Total leaseback obligations | $ 0 | $ 55,538

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- Definition Financing Obligations + References No definition available. + Details
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Namespace Prefix: | dxm_
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- Definition Financing Obligations, Minimum Lease Payments, Failed Sale-Leaseback Transaction + References No definition available. + Details
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- Definition Financing Obligations, Noncash Residual Value Of Failed Sale-Leaseback Transaction + References No definition available. + Details
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Namespace Prefix: | dxm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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