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Note 8 - Stockholders' Equity - Warrants (Details) | 6 Months Ended
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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