Note 3 - Revenue Recognition - Disaggregated Revenue by Revenue Stream (Details) - Customer Concentration Risk [Member] |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
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| Third-Party Payor Rental Revenue [Member] | ||||
| Revenue | 49.60% | 46.80% | 49.10% | 47.60% |
| Director Payer Rentals [Member] | ||||
| Revenue | 30.80% | 35.80% | 32.70% | 37.60% |
| Revenue, Product and Service Benchmark [Member] | ||||
| Revenue | 19.60% | 17.40% | 18.20% | 14.80% |
| Revenue from Contract with Customer Benchmark [Member] | ||||
| Revenue | 100.00% | 100.00% | 100.00% | 100.00% |
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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