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Long-Term Debt and Other Financial Liabilities, Second JDH Loan (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended 12 Months Ended
May 06, 2021
Apr. 26, 2021
Jan. 08, 2021
Dec. 31, 2020
Feb. 28, 2021
Dec. 31, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Feb. 19, 2021
Aug. 20, 2020
May 07, 2020
May 04, 2020
Apr. 22, 2020
Apr. 14, 2020
Apr. 02, 2020
May 13, 2019
Mar. 31, 2019
May 24, 2017
Loan Agreement [Abstract]                                      
Repayment of long-term debt             $ 132,058 $ 52,514 $ 17,598                    
Number of units issued (in shares) 4,285,714 4,285,714 7,986,913                                
Number of securities called by each warrant (in shares)   1 1 1       1                      
Warrant exercise price (in dollars per share)   $ 0.70 $ 0.70       $ 5.00                 $ 2.72      
Share price (in dollars per share)   $ 0.70 $ 0.70 $ 0.70       $ 0.70   $ 1.70   $ 1.92 $ 1.92 $ 1.92 $ 2.16   $ 3.40    
Repayment of subordinated long-term debt by issuance of shares             $ 3,000 $ 0 $ 0                    
Balance outstanding       $ 173,289     218,551 173,289                      
Pre-Funded Warrant [Member]                                      
Loan Agreement [Abstract]                                      
Number of securities included in each unit (in shares)   1 1                                
Warrant [Member]                                      
Loan Agreement [Abstract]                                      
Number of securities included in each unit (in shares)   1 1                                
Common Stock [Member]                                      
Loan Agreement [Abstract]                                      
Number of securities included in each unit (in shares)   1 1               35,714,286           1    
Second JDH Loan [Member]                                      
Loan Agreement [Abstract]                                      
Face amount                                     $ 16,200
Accrued and unpaid interest             841                     $ 354  
Interest rate           0.00%                          
Fair value of option granted $ 424     543       $ 543                      
Repayment of long-term debt       $ 6,500 $ 100                            
Repayment of subordinated long-term debt by issuance of shares $ 3,000 $ 3,000                                  
Balance outstanding             1,850                        
Deferred financing costs             $ 44                        
Second JDH Loan [Member] | LIBOR [Member]                                      
Loan Agreement [Abstract]                                      
Term of variable rate             3 months                        
Margin on variable rate             6.00%