Note 5 - SBA Paycheck Protection Program (Details) - USD ($) $ in Thousands		12 Months Ended
Apr. 20, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other income		$ 11,926	$ 1,758	$ 2,518
PPP Loan
Proceeds from loan	$ 8,400
Other income		$ 8,400

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585

Name:	us-gaap_ProceedsFromIssuanceOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration