Supplemental Cash Flow Information - Narratives (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2021	Jun. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Employee retention credit		$ 1.9
Employee retention expense	$ 0.9	0.8
Employee retention credit available	$ 1.9	$ 1.1

Unusual Or Infrequent Item Employee Retention Credit CARES Act

No definition available.

Name:	ftk_UnusualOrInfrequentItemEmployeeRetentionCreditCARESAct
Namespace Prefix:	ftk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration