Subsequent Events - Additional information (Detail) - Subsequent Event - MGG Investment Group, LP $ / shares in Units, $ in Millions	Nov. 07, 2019 USD ($) $ / shares
Minimum [Member]
Cash held in trust account after redemptions	$ 80
Convertible Debt [Member]
Debt instrument maximum borrowing capacity	$ 150
Convertible debt term	5 years
Cash held in trust account after redemptions	$ 130
Debt instrument face amount	$ 100
Debt instrument interest rate	8.00%
Paid in cash interest percent	4.00%
Paid in kind interest percent	4.00%
Share price threshold \| $ / shares	$ 18.00

Cash held in trust account after redemptions.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Convertible debt term.

+ References

No definition available.

+ Details

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- Definition

Paid in cash interest percent.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Paid in kind interest percent.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Share price threshold.

+ References

No definition available.

+ Details

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Namespace Prefix:	pvt_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Period Type:	instant

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- Details

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- Details

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