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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Current Assets:    
Allowance for doubtful accounts $ 1,161 $ 918
Allowance for inventory obsolescence 221 24
Assets, Noncurrent [Abstract]    
Accumulated depreciation, rental equipment 175,802 162,348
Accumulated depreciation, property and equipment 13,916 12,847
Accumulated amortization, operating lease right of use assets 356  
Accumulated amortization, intangibles $ 2,008 $ 1,883
Stockholders’ Equity:    
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, shares authorized (in shares) 30,000,000 30,000,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares issued (in shares) 13,296,000 13,178,000
Common stock, shares outstanding (in shares) 13,296,000 13,178,000
Treasury shares (in shares) 38,000