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LONG-TERM DEBT | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Long-term Debt [Text Block] | Note 5 – Long-Term Debt Long-term debt consists primarily of seven notes with three financing companies collateralized by the Gamma Knife equipment having an aggregate net book value of $13,016,000, the individual customer contracts and related accounts receivable at December 31, 2018. These notes are payable in 36 to 84 fully amortizing monthly installments, mature between December 2019 and March 2026, and are collateralized by the respective Gamma Knife units. The notes accrue interest at fixed annual rates between 4.96% and 6.90%. The following are contractual maturities of long-term debt by year at December 31, 2018:
Year ending December 31, |  | Principal |  |  | Interest |
2019 |  | $ | 2,119,000 |  |  | $ | 276,000 |
2020 |  |  | 1,378,000 |  |  |  | 163,000 |
2021 |  |  | 712,000 |  |  |  | 100,000 |
2022 |  |  | 263,000 |  |  |  | 71,000 |
2023 |  |  | 280,000 |  |  |  | 54,000 |
Thereafter |  |  | 699,000 |  |  |  | 53,000 |
|  | $ | 5,451,000 |  |  | $ | 717,000 |

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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