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v3.21.1

CREDIT FACILITY AND NOTES PAYABLE (Details - Margin Spread Based on Leverage Ratio, Debt Instrument) - Restated Agreement |  | 3 Months Ended
--- | --- | ---
Aug. 31, 2018 | Mar. 31, 2021
Pricing Level I |  |
Debt Instrument [Line Items] |  |
Leverage ratio, greater than | 3.00 |
Pricing Level I | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Commitment fee percentage | 2.75% |
Unused capacity, commitment fee percentage | 0.45% |
Pricing Level I | Eurodollar | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 2.75% |
Pricing Level I | Base Rate | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.75% |
Pricing Level II |  |
Debt Instrument [Line Items] |  |
Leverage ratio, greater than | 2.50 |
Leverage ratio, less than | 3.00 |
Pricing Level II | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Commitment fee percentage | 2.25% |
Unused capacity, commitment fee percentage | 0.40% |
Pricing Level II | Eurodollar | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 2.25% |
Pricing Level II | Base Rate | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.25% |
Pricing Level III |  |
Debt Instrument [Line Items] |  |
Leverage ratio, greater than | 2.00 |
Leverage ratio, less than | 2.50 |
Pricing Level III | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Commitment fee percentage | 2.00% |
Unused capacity, commitment fee percentage | 0.35% |
Pricing Level III | Eurodollar | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 2.00% | 0.25%
Pricing Level III | Base Rate | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.00% |
Pricing Level IV |  |
Debt Instrument [Line Items] |  |
Leverage ratio, greater than | 1.50 |
Leverage ratio, less than | 2.00 |
Pricing Level IV | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Commitment fee percentage | 1.75% |
Unused capacity, commitment fee percentage | 0.30% |
Pricing Level IV | Eurodollar | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.75% |
Pricing Level IV | Base Rate | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 0.75% |
Pricing Level V |  |
Debt Instrument [Line Items] |  |
Leverage ratio, less than | 1.50 |
Pricing Level V | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Commitment fee percentage | 1.50% |
Unused capacity, commitment fee percentage | 0.30% |
Pricing Level V | Eurodollar | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 1.50% |
Pricing Level V | Base Rate | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Basis spread on variable rate | 0.50% |

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- Definition Debt Instrument, Covenant, Leverage Ratio, Maximum + References No definition available. + Details
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Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition Debt Instrument, Covenant, Liquidity Ratio Required, Minimum + References No definition available. + Details
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Namespace Prefix: | rdnt_
Data Type: | xbrli:pureItemType
Balance Type: | na
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration

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- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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