Note 3 - Fair Value - Summary of Change in Fair Value for Warrants and Contingent Consideration (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)
Warrant [Member]
Balance	$ 255
Exercise of warrants	(2,236)
Change in fair value	1,981
Current portion	0
Long-term portion	0
Balance	0
Contingent Consideration [Member]
Balance	3,936
Exercise of warrants	0
Change in fair value	257
Current portion	0
Long-term portion	4,193
Balance	$ 4,193

Current portion of liability measurement with unobservable inputs on recurring basis.

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

Noncurrent portion of liability measurement with unobservable inputs on recurring basis.

+ References

No definition available.

+ Details

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Namespace Prefix:	asxc_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

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Balance Type:	credit
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Period Type: