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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Allowance for doubtful accounts $ 371 $ 408
Accumulated depreciation, Property, plant and equipment 25,240 26,692
Accumulated depreciation, Rental assets 5,919 5,392
Accumulated amortization, Intangible assets $ 63,425 $ 48,404
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) 107,846,082 105,380,533
Common stock, shares outstanding (in shares) 107,846,082 105,380,533
Revolving credit facility, net $ 3,451 $ 0
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