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Note 7 - Stockholders' Equity - Warrants Outstanding by Exercise Price (Details) - $ / shares	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Exercise prices of warrants (in dollars per share)		$ 6.60
Warrants outstanding (in shares)	25,000
Warrants outstanding, weighted average remaining contractual life (Year)	1 year 43 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 2.96
Warrants exercisable (in shares)	25,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 2.96
Warrant 1 [Member]
Exercise prices of warrants (in dollars per share)	$ 2.96
Warrants outstanding (in shares)	25,000
Warrants outstanding, weighted average remaining contractual life (Year)	1 year 43 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 2.96
Warrants exercisable (in shares)	25,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 2.96

X

- Definition

Number of warrants or rights exercisable.

+ References

No definition available.

+ Details

Name:	liqt_ClassOfWarrantOrRightExercisable
Namespace Prefix:	liqt_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted average exercise price per share or per unit of warrants or rights exercisable.

+ References

No definition available.

+ Details

Name:	liqt_ClassOfWarrantOrRightExercisableWeightedAverageExercisePrice
Namespace Prefix:	liqt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The weighted average exercise price per share or per unit of warrants or rights outstanding.

+ References

No definition available.

+ Details

Name:	liqt_ClassOfWarrantOrRightOutstandingWeightedAverageExercisePrice
Namespace Prefix:	liqt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Weighted average remaining contractual term for a class of warrant or right.

+ References

No definition available.

+ Details

Name:	liqt_ClassOfWarrantOrRightWeightedAverageRemainingContractualLife
Namespace Prefix:	liqt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

X

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=liqt_Warrant1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: