Prepayments and other receivables (Details Textual)	12 Months Ended
Dec. 31, 2018 USD ($)
Allowance for Doubtful Accounts Receivable Recoveries Current	$ 476,680

Amount of recoveries of receivables doubtful of collection that were previously charged off.

No definition available.

Name:	hpj_AllowanceForDoubtfulAccountsReceivableRecoveriesCurrent
Namespace Prefix:	hpj_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration