PROPERTY AND EQUIPMENT

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property and equipment consists of the following:


	DECEMBER 31,
	2020		2019
Medical equipment and facilities	$	75,657,000	$	92,132,000
Office equipment	330,000		594,000
Construction in progress	170,000		1,965,000
Deposits towards purchase of proton beam systems	—		2,250,000
	76,157,000		96,941,000
Accumulated depreciation	(45,739,000)		(55,461,000)
Net property and equipment	$	30,418,000	$	41,480,000

As of December 31, 2020, approximately $3,195,000 of the net property and equipment balance is outside of the United States. As December 31, 2020, the Company recognized a loss on the write down of impaired assets of $8,264,000. The impaired assets included six (6) Gamma Knife units and related removal costs, and two (2) deposits towards the purchase of proton beam systems and related capitalized interest. The six (6) Gamma Knife units that were impaired consisted of two (2) units that had been taken out of service in prior years, one (1) unit that was taken out of service in 2020 and three (3) units that have already been, or the Company anticipates will be, taken out of service in 2021, totaling $3,051,000. In addition to this impairment write-off of $3,051,000 were estimated costs of de-install and removal (ARO) of four (4) of the Gamma Knife units of $1,350,000 (of which, the Company has paid $80,000) as of December 31, 2020. Total impairment related to the Gamma Knife business was $4,401,000 for the year ended December 31, 2020.

The Company reviews the carrying value of its long-lived assets for impairment on a quarterly basis, or as events or circumstances might indicate that the carrying value may not be recoverable. The Company has reviewed its Gamma Knife equipment, in light of available information as of December 31, 2020 and based on current customer prospects, the probability of future contract extensions or renewals, and the high turnover rate in contract terminations compared to the Company's historical contract termination rate, the Company determined that these six (6) Gamma Knife units were more-than temporarily impaired.

Prior to December 31, 2020, the Company had $2,250,000 in deposits toward the purchase of two MEVION S250i PBRT systems from Mevion. The Company reviews the carrying value of its deposits for impairment on a quarterly basis, or as events or circumstances might indicate that the carrying value may not be recoverable. The Company has reviewed the deposits, in light of available information, as of December 31, 2020 and based on its current customer prospects, the impact that the COVID-19 pandemic has had on medical centers undertaking large capital expenditure projects for a limited patient base, and the length of time required to negotiate and implement a proton therapy project, the Company determined that its deposits of $2,250,000, related capitalized interest and other charges of $1,613,000 were other-than temporarily impaired. Total impairment related to the proton therapy business was $3,863,000.