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Note 8 - Shareholders' Equity (Details Textual) - shares		9 Months Ended
	Mar. 10, 2016	Nov. 28, 2021	Nov. 29, 2020	Jan. 03, 2022	Jan. 08, 2015	Jan. 07, 2015
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares)					1,250,000
Stock Repurchase Program, Percentage of Outstanding Shares Authorized to be Repurchased						6.00%
Common Stock, Shares, Outstanding, Ending Balance (in shares)						20,945,634
Stock Repurchase Program, Number of Additional Shares Authorized to be Repurchased (in shares)	1,000,000
Stock Repurchased During Period, Shares (in shares)		0	137,397
Subsequent Event [Member]
Stock Repurchase Program, Percentage of Outstanding Shares Authorized to be Repurchased				6.80%
Common Stock, Shares, Outstanding, Ending Balance (in shares)				20,458,210
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)				1,394,015

X

- Definition

The additional number of shares authorized, during the period, to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	pke_
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X

- Definition

The percent of outstanding stock authorized to be repurchased

+ References

No definition available.

+ Details

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X

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 2: 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(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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X

- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

+ Details

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X

- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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X

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 4: 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(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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