Note 2 - Revenue (Details Textual) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2020
USD ($)
|
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Revenue from Contract with Customers, Sales Returns, Percent | 2.00% | 2.00% | ||
| Contract with Customer, Liability, Revenue Recognized | $ 1,900,000 | |||
| Contract with Customer Liability, Increase from Cash Receipts | $ 565,000 | |||
| Geographic Concentration Risk [Member] | Revenue Benchmark [Member] | ||||
| Number of Major Markets | 0 | 0 | 0 | 0 |
| Customer Concentration Risk [Member] | Revenue Benchmark [Member] | ||||
| Number of Major Customers | 0 | 0 | 0 | 0 |
| Minimum [Member] | ||||
| Revenue from Contract with Customer, Sales Returns Policy Term (Day) | 14 days | |||
| Revenue from Contract with Customers, Historical Sales Returns, Percent | 1.00% | |||
| Maximum [Member] | ||||
| Revenue from Contract with Customer, Sales Returns Policy Term (Day) | 1 year | |||
| Revenue from Contract with Customers, Historical Sales Returns, Percent | 10.00% | |||
| X | ||||||||||
- Definition Amount of increase (decrease) in obligation to transfer good or service to customer for which consideration from customer has been received or is due, from cash receipts. No definition available.
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| X | ||||||||||
- Definition Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. No definition available.
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| X | ||||||||||
- Definition Represents the number of major markets accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc. No definition available.
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| X | ||||||||||
- Definition Represents the sales returns policy term. No definition available.
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| X | ||||||||||
- Definition Represents the percentage of historical sales returns. No definition available.
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| X | ||||||||||
- Definition Represents the percentage of sales returns. No definition available.
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| X | ||||||||||
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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