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Rental Equipment	3 Months Ended
Rental Equipment	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Rental Equipment	Rental Equipment Rental equipment is shown net of accumulated depreciation of $10,044,000 and $9,413,000 at March 31, 2018 and December 31, 2017, respectively. The Company recognized depreciation expense of $1,405,000 and $1,407,000 for the three months ended March 31, 2018 and March 31, 2017, respectively.