Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details)

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Note 4 - Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Revenues, Total $ 24,834 $ 25,999 $ 49,297 $ 47,552
Percentage of total net revenues 100.00% 100.00% 100.00% 100.00%
Third-Party Payor Rental Revenue [Member]        
Revenues, Total $ 13,130 $ 12,752 $ 25,924 $ 23,988
Percentage of total net revenues 52.90% 49.00% 52.60% 50.50%
Direct Payer Rentals [Member]        
Revenues, Total $ 8,354 $ 7,940 $ 16,440 $ 14,800
Percentage of total net revenues 33.60% 30.60% 33.30% 31.10%
Product Sales [Member]        
Revenues, Total $ 3,350 $ 5,307 $ 6,933 $ 8,764
Percentage of total net revenues 13.50% 20.40% 14.10% 18.40%