Overview and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Allowance for Obsolescent Inventory

The components of the allowance for inventory obsolescence are set forth below (in thousands):

	Balance Beginning of Year		Additions Charge to Costs and Expense		Recoveries		Balance End of Year
Year Ended December 31, 2021	$	851	$	10	$	—	$	861
Year Ended December 31, 2020	$	860	$	(1)	$	(8)	$	851
Year Ended December 31, 2019	$	520	$	376	$	(36)	$	860

Property, Plant and Equipment

Property and equipment are recorded at cost. Depreciation is provided using the straight-line method at rates based on the estimated useful lives of the individual assets or classes of assets as follows:

Furniture and equipment	3-5   Years
Leasehold improvements	Lesser of life of lease or useful life of asset
Property and equipment under finance leases	Lesser of life of lease or useful life of asset

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Potentially dilutive securities are as follows (in common stock equivalent shares, in thousands):

	Year Ended December 31,
	2021	2020
Unvested restricted stock	520	60
Common stock warrants, exercisable at $1.665/sh.	400	901
Total	920	961