Derivative Instruments - Additional Information (Detail)	9 Months Ended
Sep. 30, 2023
Derivative Instrument Detail [Abstract]
Number of days determining maturity on derivative	30 days

Number of days determining maturity on derivative.

No definition available.

Name:	ivac_NumberOfDaysDeterminingMaturityOnDerivative
Namespace Prefix:	ivac_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration