Consolidated Statements of Stockholders' (Deficit) Equity (Parenthetical) $ in Thousands	3 Months Ended
Mar. 31, 2019 USD ($)
Statement of Stockholders' Equity [Abstract]
Reclassification of interest, tax effect	$ 315

Tax effect of reclassification to equity of interest paid in kind attributable to conversion option

No definition available.

Name:	ctam_ReclassificationOfInterestTaxEffect
Namespace Prefix:	ctam_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration