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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Allowance for doubtful accounts $ 561 $ 541
Accumulated depreciation, Property, plant and equipment 26,688 26,049
Accumulated depreciation, Rental assets 6,258 5,484
Accumulated amortization, Intangible assets $ 38,447 $ 31,629
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 2,000,000 2,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 150,000,000 150,000,000
Common stock, shares issued (in shares) 109,371,693 108,468,150
Common stock, shares outstanding (in shares) 109,371,693 108,468,150
Revolving credit facility, net $ 3,651 $ 6,919
Series E preferred stock    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 39,500 39,500
Preferred stock issued (in shares) 25,000 25,000
Preferred stock, shares outstanding (in shares) 25,000 25,000
Preferred stock, liquidation preference per share (in dollars per share) $ 1,000 $ 1,000