Inventories

3 Months Ended

Mar. 31, 2021

Inventory Disclosure [Abstract]

Inventories

Note 3 — Inventories

Inventories consist of the following at:

	March 31, 2021			December 31, 2020
Finished goods	$	68,303		$	40,682
Work in process		19,000			18,000
Rental units		62,531			62,531
Parts and subassemblies		666,729			603,443
		816,563			724,656
Less: reserve for rental units		(22,772	)		(17,542	)
Inventories, net	$	793,791		$	707,114