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Note T - Commitments and Contingencies (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Aug. 09, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Lease, Expense		$ 1,230	$ 1,206
Loss Contingency, Obligation for Sales and Use Tax [Member]
Loss Contingency, Potential Obligation	$ 1,000
Loss Contingency Accrual, Payments	400
Loss Contingency, Obligation for Sales and Use Tax [Member] | Minimum [Member]
Loss Contingency, Estimate of Possible Loss	200
Loss Contingency, Obligation for Sales and Use Tax [Member] | Maximum [Member]
Loss Contingency, Estimate of Possible Loss	$ 400
Other Commitments, Rent Expense [Member]
Operating Lease, Expense		$ 1,300	$ 1,400	$ 1,300

X

- Definition

Describes the form and magnitude of the amount of the potential obligation.

+ References

No definition available.

+ Details

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X

- Definition

Amount of cash outflow reducing loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
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+ Details

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X

- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12021-110248

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X

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918638-209977

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