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11. Series A Warrants (Details Narrative) - Securities Purchase Agreement [Member] - Starboard [Member] - Series A Warrants [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Nov. 18, 2019
Conversion price			$ 3.65
Fair value of warrants	$ 2,600	$ 3,600
Warrants exercised	0

X

- Definition

Warrants exercised, shares

+ References

No definition available.

+ Details

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Namespace Prefix:	ACTG_
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Balance Type:	na
Period Type:	duration

X

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870

+ Details

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Balance Type:	na
Period Type:	instant

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

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Namespace Prefix:	us-gaap_
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- Details

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Period Type:

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- Details

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- Details

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Namespace Prefix:
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