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Note 7 - Leases - Supplemental Balance Sheet Information Related to Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating lease right-of use assets	$ 7,408	$ 7,761
Current portion, operating lease liabilities	2,060	2,111
Operating lease liabilities, long term	7,159	7,481
Total operating lease liabilities	$ 9,219	$ 9,592
Weighted average remaining lease term (in years) (Year)	7 years 3 months 18 days	7 years 4 months 24 days
Weighted average discount rate	9.30%	9.30%

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918627-209977

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Period Type:	instant

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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-Publisher FASB
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X

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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-Publisher FASB
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X

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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-Publisher FASB
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X

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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