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LONG-TERM DEBT | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
LONG-TERM DEBT | LONG TERM DEBT Long-term debt consists primarily of six notes with two financing companies collateralized by the Gamma Knife equipment having an aggregate net book value of $13,130,000, the individual customer contracts and related accounts receivable of $1,848,000 at December 31, 2019. These notes are payable in 36 to 84 fully amortizing monthly installments, mature between April 2020 and March 2026, and are collateralized by the respective Gamma Knife units. The notes accrue interest at fixed annual rates between 5.25% and 6.90%. As of December 31, 2018, the Company had seven notes with three financing companies collateralized by the Gamma Knife equipment, the individual customer contracts and related accounts receivable, having an aggregate net book value of $13,016,000. The following are contractual maturities of long-term debt by year at December 31, 2019:
Year ending December 31, |  | Principal |  | Interest
2020 |  | $ | 1,526,000 |  |  | $ | 163,000 |
2021 |  | 711,000 |  |  | 101,000 |
2022 |  | 263,000 |  |  | 71,000 |
2023 |  | 280,000 |  |  | 54,000 |
2024 |  | 299,000 |  |  | 36,000 |
Thereafter |  | 401,000 |  |  | 17,000 |
|  | $ | 3,480,000 |  |  | $ | 442,000 |

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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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