Quarterly report pursuant to Section 13 or 15(d)

MEZZANINE EQUITY (Details)

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MEZZANINE EQUITY (Details)
$ / shares in Units, $ in Millions
 1 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
owner
$ / shares
shares
Mar. 31, 2023
$ / shares
shares
Temporary Equity [Line Items]      
Number of unaffiliated investors | owner   2  
Number of warrants per unit (in shares) | shares 2.5    
Aggregate number of common stock (in shares) | shares     41,824,476
Exercise price of warrants (in dollars per share) | $ / shares $ 1.087   $ 1.46
Value of warrants issued | $ $ 9.5    
Equity issuance costs | $ 0.4    
Proceeds received from sale of equity | $ 23.0    
Proceeds used to fund construction and upgrades of owned and managed facilities | $ 7.3    
Proceeds used to pay down debt and related interest | $ $ 15.7    
Hadron Healthcare      
Temporary Equity [Line Items]      
Term of warrants (in years) 4 years    
Series B Convertible Preferred Stock      
Temporary Equity [Line Items]      
Share price (in dollars per share) | $ / shares   $ 3.00  
Term of option to convert (in years)   6 years  
Conversion price of preferred stock (in dollars per share) | $ / shares   $ 3.00  
Threshold VWAP, in excess of (in dollars per share) | $ / shares   $ 4.00  
Number of consecutive trading days   20 days  
Number of consecutive trading dates after anniversary   60 days  
VWAP threshold, less than or equal to (in dollars per share) | $ / shares   $ 0.50  
Conversion price after anniversary (in dollars per share) | $ / shares   1.00  
VWAP threshold, greater than (in dollars per share) | $ / shares   $ 0.50  
Series B Convertible Preferred Stock | Exchange Agreement | Two Unaffiliated Institutional Shareholders      
Temporary Equity [Line Items]      
Debt instrument, face amount | $   $ 4.4  
Number of shares converted (in shares) | shares   4,908,333  
Series C Convertible Preferred Stock | Hadron Healthcare      
Temporary Equity [Line Items]      
Shares issued per unit (in shares) | shares 1    
Shares issued (in shares) | shares 6,216,216    
Series C Convertible Preferred Stock | Securities Purchase Agreement | Maximum | Hadron Facility | Convertible Debt      
Temporary Equity [Line Items]      
Debt instrument, face amount | $ $ 46.0    
Common stock      
Temporary Equity [Line Items]      
Shares issued on conversion of preferred stock (per share) | shares 5    
Common stock | Maximum      
Temporary Equity [Line Items]      
Aggregate number of common stock (in shares) | shares 15,540,540    
Units Consisting of Convertible Debt and Warrants | Securities Purchase Agreement      
Temporary Equity [Line Items]      
Value of shares purchased | $ $ 23.0    
Units | Securities Purchase Agreement      
Temporary Equity [Line Items]      
Price per unit (in dollars per unit) | $ / shares $ 3.70