XML 56 R38.htm IDEA: XBRL DOCUMENT
v3.20.1

Note 4 - Revenue From Contracts With Customers (Details Textual) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease), Total | $ 0

X
- Definition Amount of increase (decrease) in allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
Name: | us-gaap_AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration