Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Revenue Disclosures - Revenue Related to Performance Obligations 2 (Details)

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Note 3 - Revenue Disclosures - Revenue Related to Performance Obligations 2 (Details)
Jun. 30, 2019
USD ($)
Revenue expected to be recognized $ 15,350
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 1,356
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 2,694
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 2,572
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 2,150
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 1,788
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Remaining Performance Obligation, Expected Timing of Satisfaction (Year) 1 year
Revenue expected to be recognized $ 4,790