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Note 4 - Allowance for Credit Losses (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Accounts Receivable, Allowance for Credit Loss [Table Text Block] |
|  | Allowance for Credit Losses |
|  | Six Months Ended June 30, 2020 |
Allowance - beginning of period |  | $ | 486 |
Provision for expected credit losses |  |  | 167 |
Amounts written off against the allowance |  |  | (10 | )
Allowance - end of period |  | $ | 643 |

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- Definition Tabular disclosure of 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
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration