Stockholders' Equity - Demand Registration Rights (Details)	Jun. 25, 2019
2019 Rights Agreement
Demand registration rights
Maximum days to register for resale shares held by investors	120 days

Maximum Days To Register For Resale Shares Held By Investors

No definition available.

Name:	cfms_MaximumDaysToRegisterForResaleSharesHeldByInvestors
Namespace Prefix:	cfms_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration