Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Deficit (Parenthetical)	6 Months Ended
Jun. 30, 2019 USD ($)
Series C convertible preferred stock
Convertible Preferred Stock, Issuance Costs	$ 53,509

Direct costs associated with issuing stock classified as temporary equity.

No definition available.

Name:	apre_TemporaryEquityStockIssuedIssuanceCosts
Namespace Prefix:	apre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration