Note 7 - Fair Value Measurements - Summary of Gains and Losses Before Income Taxes on Interest Rate Swap Cash Flow Hedges (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
(Loss) gain recognized in accumulated other comprehensive loss	$ (40)	$ 387
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
(Loss) gain recognized in accumulated other comprehensive loss	(40)	387
Gain reclassified from accumulated other comprehensive loss	$ 706	$ 444

Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580

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