Condensed Consolidated Statements of Stockholders' Equity (unaudited) (Parenthetical)	Mar. 31, 2023 shares
Common stock shares not issued and holdback as partial security for indemnification obligations	371,006

Common stock shares not issued and holdback as partial security for indemnification obligations.

No definition available.

Name:	flgt_CommonStockSharesNotIssuedAndHoldbackAsPartialSecurityForIndemnificationObligations
Namespace Prefix:	flgt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant