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Note 8 - Stockholders' Equity - Warrants (Details)	6 Months Ended
	Jun. 30, 2021 shares
Warrants outstanding at January 1 (in shares)	515,000
Exercises and conversions (in shares)	0
Warrants outstanding at June 30 (in shares)	515,000

X

- Definition

The number of warrants or rights exercised or converted during period.

+ References

No definition available.

+ Details

Name:	liqt_ClassOfWarrantOrRightExercisedOrConvertedDuringPeriod
Namespace Prefix:	liqt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant