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COMMITMENTS AND CONTINGENCIES
 12 Months Ended
Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES
On December 20, 2018, the Company signed Second Amendments to two System Build Agreements for the Company’s second and third Mevion PBRT units. The Company and Mevion have agreed to upgrade the second and third PBRT units for which the Company has purchase commitments. The Company is actively seeking sites for these units but, to date, has not entered into agreements with any party for either placement of a PBRT unit or the related financing. The Company projects that it will be required to commence delivery of the second and third PBRT units no later than 2023. In the event the Company is unable to enter into customer agreements within the requisite time frame or receive an extension from Mevion, the Company could forfeit its deposits, which are described below.

As of December 31, 2020, the Company had commitments to perform three (3) Cobalt-60 reloads and install four (4) Leksell Gamma Knife Icon Systems (“Icon”) at existing customer sites, and purchase two (2) Linear Accelerator ("LINAC") systems, one to be placed at an existing customer site and one at a new customer site. The Company also has a commitment to upgrade the Gamma Knife unit at its stand-alone facility in Ecuador to a Perfexion. The Cobalt-60 reloads, Icon upgrades, and LINAC purchases are scheduled to occur between 2021 and 2022. The Company expects to upgrade the equipment in Ecuador in the second quarter of 2021. Total Gamma Knife and LINAC commitments as of December 31, 2020 were $12,210,000. There are no significant cash requirements, pending financing, for these commitments in the next 12 months. There can be no assurance that financing will be available for the Company’s current or future projects, or at terms that are acceptable to the Company. 

On July 21, 2017, the Company entered into a Maintenance and Support Agreement (the “Mevion Service Agreement”) with Mevion, which provides for maintenance and support of the Company’s PBRT unit at Orlando Health. The Mevion Service Agreement began September 5, 2017, was amended in 2018, and renews annually over a five (5) year period. The agreement requires an annual prepayment of $1,572,000 for the current contractual period. This payment portion was recorded as a prepaid contract and will be amortized over the one-year service period.

As of December 31, 2020, the Company had commitments to service and maintain its Gamma Knife and PBRT equipment. The service commitments are carried out via contracts with Mevion, Elekta and Mobius Imaging, LLC. In addition, in April 2019, the Company signed agreements to service the Icon upgrades which will be installed at various dates between 2021 and 2022. The Company’s commitments to purchase two LINAC systems also include a 9-year and 5-year agreement to service the equipment, respectively. Total service commitments as of December 31, 2020 were $10,493,000. The Gamma Knife and certain other service contracts are paid monthly, as service is performed. The Company believes that cash flow from cash on hand and operations will be sufficient to cover these payments.
The Company estimates the following commitments for each of the equipment systems, with expected timing of payments as follows as of December 31, 2020:
Total amounts committed20212022-20232024-2025After 5 years
Long-term debt (includes interest)$5,251,000 $1,373,000 $1,854,000 $1,543,000 $481,000 
Finance leases (includes interest)9,771,000 6,590,000 2,659,000 522,000 — 
Future equipment purchases46,210,000 2,175,000 44,035,000 — — 
Equipment service contracts10,493,000 2,030,000 2,585,000 2,999,000 2,879,000 
Acquisition working capital payments197,000 197,000 — — — 
Operating leases972,000 350,000 614,000 8,000 — 
Total Commitments$72,894,000 $12,715,000 $51,747,000 $5,072,000 $3,360,000