Fair Value Measurements - Additional information (Details)	3 Months Ended
Mar. 31, 2021 $ / shares
Fair Value Measurements
Purchase price	$ 10.00
Warrant redemption condition minimum share price	$ 18.00

The minimum trading price for the reporting entity's stock which must be achieved as a condition for redemption of the warrant.

No definition available.

Name:	motv_WarrantRedemptionConditionMinimumSharePrice
Namespace Prefix:	motv_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration