Supplementary Balance Sheet Information

The following tables show the Company’s consolidated balance sheet details as of December 31, 2019 and 2018 (in thousands):



	December 31, 2019			December 31, 2018
Inventories:
Raw materials	$	4,309		$	2,419
Work-in-process	2,710			2,307
Finished goods	461			1,056
Total inventories	7,480			5,782
Less reserve for excess and obsolete inventories	(383		)	(380		)
Total inventories, net	$	7,097		$	5,402



	December 31, 2019			December 31, 2018
Property and equipment, net:
Land	$	995		$	550
Buildings and Leasehold improvements	5,451			1,989
Machinery and equipment	53,199			52,409
Computer hardware and software	4,218			4,490
Total property and equipment	63,863			59,438
Accumulated depreciation	(41,725		)	(37,793		)
Total property and equipment, net	$	22,138		$	21,645

Depreciation expense for the years ended December 31, 2019 and 2018 was $6.3 million and $7.3 million, respectively. In April 2019, Digirad purchased three manufacturing facilities, including land, in Maine that manufacture modular buildings (two of which were purchased from KBS Builders, Inc., a wholly-owned subsidiary of ATRM (“KBS”)) for $5.2 million and leased those three properties to KBS. KBS subleased the manufacturing building located in Waterford, Maine to North Country Steel Inc., a Maine corporation with an initial 5 year term rental agreement, commenced on September 6, 2019. The rental agreement is structured with a monthly payment arrangement and is accounted for as operating lease. Refer to lease income discussed in Note 4. Revenue.



	December 31, 2019
	Weighted-Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net
Intangible assets with finite useful lives:
Customer relationships	10.0	$	21,953	$	(5,746	)	$	16,207
Trademarks	13.6	8,594		(2,206		)	6,388
Patents	15.0	141		(138		)	3
Covenants not to compete	5.0	181		(174		)	7
Backlog	1.0	430		(132		)	298
Total intangible assets, net		$	31,299	$	(8,396	)	$	22,903

	December 31, 2018
	Weighted-Average Useful Life (years)	Gross Carrying Amount		Accumulated Amortization			Intangible Assets, Net
Intangible assets with finite useful lives:
Customer relationships	9.8	$	8,453	$	(4,751	)	$	3,702
Trademarks	6.0	3,055		(1,577		)	1,478
Patents	15.0	141		(136		)	5
Covenants not to compete	5.0	181		(138		)	43
Total intangible assets, net		$	11,830	$	(6,602	)	$	5,228

Amortization expense for intangible assets, net for the years ended December 31, 2019 and 2018 was $1.8 million, and $1.4 million respectively. Estimated amortization expense for intangible assets for 2020 is $3.1 million, for 2021 is $2.8 million, for 2022 is $2.2 million, for 2023 is $2.2 million, for 2024 is $2.2 million, and thereafter is $10.4 million.



	December 31, 2019		December 31, 2018
Other current liabilities:
Professional fees	$	634	$	358
Sales and property taxes payable	1,183		324
Radiopharmaceuticals and consumable medical supplies	79		—
Current portion of finance lease obligation	934		786
Facilities and related costs	144		259
Outside services and consulting	213		135
Other accrued liabilities	1,451		403
Total other current liabilities	$	4,638	$	2,265