Note 1 - Summary of Significant Accounting Policies - Finite Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Beginning balance			$ 501	$ 1,173	$ 1,173
Additions			41		64
Amortization	$ (35)	$ (46)	(71)	(92)	(176)
Abandonment Loss					560
Ending balance	471		471		501
Customer Relationships [Member]
Beginning balance			360	507	507
Additions			0		0
Amortization			(71)		(147)
Abandonment Loss					0
Ending balance	289		289		360
Trade Names [Member]
Beginning balance			0	589	589
Additions			0		0
Amortization			0		(29)
Abandonment Loss					560
Ending balance	0		0		0
Patents [Member]
Beginning balance			141	$ 77	77
Additions			41		64
Amortization			0		0
Abandonment Loss					0
Ending balance	$ 182		$ 182		$ 141

Amount of finite lived intangible assets, abandonment loss.

No definition available.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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