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Note 7 - Stockholders' Equity - Warrants (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Warrants outstanding January 1, 2020 (in shares) |  |  |  | 0 |
Prefunded warrants issued May 2020 (in shares) |  |  |  | 515,000 |
Exercises and conversions (in shares) |  |  |  | 0 |
Warrants outstanding June 30, 2020 (in shares) | 515,000 | 515,000 |  | 515,000 |
Base value of warrants, 515,000 warrants at $5 | $ 2,575,000 |  |  |  |
Fair value adjustment | 236,900 | $ 236,900 | $ (0) | $ 236,900 | $ (0)
Balance at June 30, 2020 | $ 2,811,900 | $ 2,811,900 |  | $ 2,811,900 |

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 The number of warrants or rights issued during period. + References No definition available. + Details
Name: | liqt_ClassOfWarrantOrRightIssuedDuringPeriod
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

X
- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875 + Details
Name: | us-gaap_FairValueAdjustmentOfWarrants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant