Annual report pursuant to Section 13 and 15(d)

Note 3 - Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details)

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Note 3 - Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Revenues, Total $ 81,115 $ 67,138
Customer Concentration Risk [Member] | Third-Party Payor Rental Revenue [Member]    
Concentration Risk, Percentage 49.90% 47.60%
Customer Concentration Risk [Member] | Director Payer Rentals [Member]    
Concentration Risk, Percentage 32.40% 36.70%
Customer Concentration Risk [Member] | Revenue, Product and Service Benchmark [Member]    
Concentration Risk, Percentage 17.70% 15.70%
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]    
Concentration Risk, Percentage 100.00% 100.00%
Third-Party Payor Rental Revenue [Member]    
Revenues, Total $ 40,510 $ 31,975
Director Payer Rentals [Member]    
Revenues, Total 26,269 24,609
Product Sales [Member]    
Revenues, Total $ 14,336 $ 10,554