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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Current Assets:    
Allowance for doubtful accounts $ 918 $ 291
Allowance for inventory obsolescence 24 19
Assets, Noncurrent [Abstract]    
Accumulated depreciation, rental equipment 162,348 165,459
Accumulated depreciation, property and equipment 12,847 11,570
Accumulated amortization, operating lease right of use assets 158  
Accumulated amortization, intangibles $ 1,883 $ 1,758
Stockholders’ Equity:    
Preferred stock, shares authorized (in shares) 5,000,000.0 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 30,000,000 30,000,000
Common stock, shares issued (in shares) 13,178,000 13,005,000
Common stock, shares outstanding (in shares) 13,178,000 13,005,000
Treasury shares (in shares) 38,000