Debt Obligations - Schedule of Other Financing Obligations (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Non-cash residual value of Tucker, Georgia lease	$ 54,676	$ 54,676
Future maturities associated with the Tucker, Georgia failed sale-leaseback liability	862	1,441
Total leaseback obligations	$ 55,538	$ 56,117

Financing Obligations, Noncash Residual Value Of Failed Sale-Leaseback Transaction

No definition available.

Name:	dxm_FinancingObligationsNoncashResidualValueOfFailedSaleLeasebackTransaction
Namespace Prefix:	dxm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant