XML 40 R30.htm IDEA: XBRL DOCUMENT v3.21.2

Marketable Securities - Additional information (Detail)	Jun. 30, 2021
Marketable Securities [Abstract]
Weighted average duration of marketable securities current	6 months 18 days
Weighted average duration of marketable securities non-current	17 months 15 days
Weighted average duration of marketable securities	10 months 12 days

X

- References

No definition available.

+ Details

Name:	asnd_MarketableSecuritiesAbstract
Namespace Prefix:	asnd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average duration of marketable securities.

+ References

No definition available.

+ Details

Name:	asnd_WeightedAverageDurationOfMarketableSecurities
Namespace Prefix:	asnd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average duration of marketable securities current.

+ References

No definition available.

+ Details

Name:	asnd_WeightedAverageDurationOfMarketableSecuritiesCurrent
Namespace Prefix:	asnd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Weighted average duration of marketable securities noncurrent.

+ References

No definition available.

+ Details

Name:	asnd_WeightedAverageDurationOfMarketableSecuritiesNoncurrent
Namespace Prefix:	asnd_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration