Concentration (Details)	9 Months Ended
Sep. 30, 2021
Risks and Uncertainties [Abstract]
Trade accounts receivable	97.00%
Revenue, percentage	10.00%

For an entity that disclose a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

No definition available.

Name:	coms_ConcentrationRiskPercentage
Namespace Prefix:	coms_
Data Type:	dtr:percentItemType
Balance Type:	na
Period Type:	duration