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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current Assets:    
Allowance for doubtful accounts $ 1,155 $ 1,161
Allowance for obsolescence 37 221
Noncurrent Assets:    
Accumulated depreciation, rental equipment 181,385 175,802
Accumulated depreciation, property and equipment 14,521 13,916
Accumulated amortization, operating lease right of use assets 410 356
Accumulated amortization, intangibles $ 2,040 $ 2,008
Stockholders’ Equity:    
Preferred stock, shares authorized (in shares) 5,000 5,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, shares authorized (in shares) 30,000 30,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares issued (in shares) 13,358 13,296
Treasury shares (in shares) 38 38