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v3.20.2

Note 1 - Organization, Description of Business and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Medicare |  |  | 18 | % |  |  | 26 | % |  |  | 23 | % |  |  | 24 | %
Johnson and Johnson Services, Inc. |  |  | * |  |  |  | 11 | % |  |  | * |  |  |  | 12 | %
UnitedHealthcare |  |  | 10 | % |  |  | 11 | % |  |  | 10 | % |  |  | 11 | %
|  |  | 28 | % |  |  | 48 | % |  |  | 33 | % |  |  | 47 | %
|  | June 30, 2020 |  |  | December 31, 2019 |
Johnson and Johnson Services, Inc. |  |  | * |  |  |  | 10 | %
Medicare |  |  | 11 | % |  |  | 15 | %
*Less than 10% |  |  |  |  |  |  |  |

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