Annual report pursuant to Section 13 and 15(d)

Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details)

v3.22.0.1
Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]      
Revenues $ 102,382 $ 97,388 $ 81,115
Third-Party Payer Rentals      
Disaggregation of Revenue [Line Items]      
Revenues 52,847 49,266 40,510
Direct Payer Rentals      
Disaggregation of Revenue [Line Items]      
Revenues 29,302 28,525 24,116
Product Sales      
Disaggregation of Revenue [Line Items]      
Revenues 15,514 17,357 14,336
Services      
Disaggregation of Revenue [Line Items]      
Revenues $ 4,719 $ 2,240 $ 2,153
Revenue from Contract with Customer Benchmark | Customer Concentration Risk      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 100.00% 100.00% 100.00%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Third-Party Payer Rentals      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 51.60% 50.60% 49.90%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Direct Payer Rentals      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 28.60% 29.30% 29.70%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Product Sales      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 15.20% 17.80% 17.70%
Revenue from Contract with Customer Benchmark | Customer Concentration Risk | Services      
Disaggregation of Revenue [Line Items]      
Concentration risk, percentage 4.60% 2.30% 2.70%