Name:	pcmi_DefinedContributionPlanEmployerContributionPercentage
Namespace Prefix:	pcmi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the vesting period of the employer's matching contributions to the defined contribution plan.

No definition available.

Name:	pcmi_DefinedContributionPlanEmployersMatchingContributionVestingPeriod
Namespace Prefix:	pcmi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	pcmi_EmployeeOrNonEmployeeBenefitsAbstract
Namespace Prefix:	pcmi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the number of non employee members in the board.

No definition available.

Name:	pcmi_NumberOfNonEmployeeMembers
Namespace Prefix:	pcmi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The period of time, from the grant date until the time at which the option expires.

No definition available.

Name:	pcmi_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationTerm
Namespace Prefix:	pcmi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The amount of the cost recognized during the period for defined contribution plans.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Gross number of share options (or share units) granted during the period.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_AwardTypeAxis=pcmi_EmployeeAndNonemployeeStockOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: