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Long-Term Debt - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended
Dec. 31, 2015
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Apr. 08, 2020
Dec. 31, 2018
Aug. 31, 2018
Feb. 28, 2017
Debt Instrument [Line Items]                    
Outstanding balance   $ 152,637,000 $ 152,914,000              
Outstanding on loan   149,941,000 150,149,000              
Unamortized debt issuance costs   $ 2,696,000 2,765,000              
RDS equipment and vehicle notes                    
Debt Instrument [Line Items]                    
Debt instrument, maturity date   May 31, 2024                
Outstanding balance   $ 126,000 $ 141,000              
December 2015, ASG loan agreement                    
Debt Instrument [Line Items]                    
Aggregate amount $ 1,700,000                  
Debt instrument, interest rate 3.75%                  
Debt instrument, maturity date range, start Apr. 08, 2016                  
Debt instrument, maturity date range, end Mar. 08, 2021                  
February 2017, ASG financing agreement                    
Debt Instrument [Line Items]                    
Debt instrument, maturity date range, start   Jul. 01, 2017                
Debt instrument, maturity date range, end   Feb. 28, 2023                
Line of credit facility, maximum borrowing capacity               $ 174,200,000 $ 101,400,000 $ 105,000,000.0
Debt instrument leverage ratio   3.75% 3.90% 3.90% 3.90% 3.90%        
Interest rate assessed   7.50%                
Outstanding on loan   $ 152,500,000 $ 152,800,000              
Percentage of net proceeds of asset disposition   100.00%                
Percentage of insurance or condemnation awards   100.00%                
Percentage of net proceeds of equity issuances   100.00%                
Percentage of net proceeds of issuance of indebtedness   100.00%                
Percentage of net cash proceeds received outside the ordinary course of business   100.00%                
February 2017, ASG financing agreement | Current portion of long-term debt                    
Debt Instrument [Line Items]                    
Estimated prepayment amount due   $ 15,700,000 15,700,000              
February 2017, ASG financing agreement | Prime Rate                    
Debt Instrument [Line Items]                    
Debt instrument, interest rate   3.50%                
February 2017, ASG financing agreement | Leverage Ratio Greater Than 2.40 | Base Rate                    
Debt Instrument [Line Items]                    
Debt instrument margin basis point   4.75%                
February 2017, ASG financing agreement | Leverage Ratio Greater Than 2.40 | LIBOR                    
Debt Instrument [Line Items]                    
Debt instrument margin basis point   6.75%                
February 2017, ASG financing agreement | Leverage Ratio Less Than 2.40 | Base Rate                    
Debt Instrument [Line Items]                    
Debt instrument margin basis point   4.25%                
February 2017, ASG financing agreement | Leverage Ratio Less Than 2.40 | LIBOR                    
Debt Instrument [Line Items]                    
Debt instrument margin basis point   6.25%                
February 2017, ASG financing agreement | Minimum                    
Debt Instrument [Line Items]                    
Net proceeds of asset disposition   $ 750,000                
February 2017, ASG financing agreement | Minimum | Leverage Ratio Greater Than 2.40                    
Debt Instrument [Line Items]                    
Debt instrument leverage ratio   2.40%                
February 2017, ASG financing agreement | Maximum                    
Debt Instrument [Line Items]                    
Gain (Loss) on Condemnation   $ 2,500,000                
February 2017, ASG financing agreement | Maximum | Leverage Ratio Less Than 2.40                    
Debt Instrument [Line Items]                    
Debt instrument leverage ratio   2.40%                
ASG term loans                    
Debt Instrument [Line Items]                    
Outstanding balance   $ 152,511,000 152,773,000              
Non-cash interest expense   100,000       $ 100,000        
Unamortized debt issuance costs   $ 2,700,000 $ 2,800,000              
ASG term loans | Minimum                    
Debt Instrument [Line Items]                    
Debt instrument leverage ratio   3.75%                
Financial covenant availability             $ 35,000,000      
ASG term loans | Maximum                    
Debt Instrument [Line Items]                    
Debt instrument leverage ratio   4.00%