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Rental Equipment, net
 12 Months Ended
Dec. 31, 2021
Rental Equipment, net [Line Items]  
Rental Equipment [Text Block]

6.  Rental Equipment, net

 

Rental equipment consists of the following:

 

In thousands

2021

 

2020

Rental equipment

$

3,664

$

3,714

Less accumulated depreciation

 

3,253

 

 

3,058

Net rental equipment

$

411

 

$

656

 

During 2021, $50,000 of fully depreciated rental equipment was written off.  Depreciation expense for rental equipment for the years ended December 31, 2021 and 2020 was $245,000 and $288,000, respectively.