Contracts in Progress - Schedule of Contracts in Progress Information (Details) (Parenthetical)	Sep. 30, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Plus under billings remaining on contracts, percentage	100.00%	100.00%

Plus under billings remaining on contracts, percentage.

No definition available.

Name:	PECK_PlusUnderBillingsRemainingOnContractsPercentage
Namespace Prefix:	PECK_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant