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Note 7 - Debt (Details Textual)
1 Months Ended 2 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 09, 2016
USD ($)
Aug. 14, 2015
USD ($)
Oct. 09, 2014
USD ($)
$ / item
Oct. 02, 2014
Aug. 08, 2014
USD ($)
Jul. 02, 2014
$ / shares
Jun. 20, 2012
USD ($)
$ / shares
shares
Jun. 20, 2012
USD ($)
$ / shares
Oct. 15, 2014
USD ($)
Dec. 31, 2014
USD ($)
$ / shares
Sep. 30, 2014
Oct. 15, 2014
USD ($)
Dec. 31, 2015
USD ($)
$ / shares
Dec. 31, 2014
$ / shares
Dec. 31, 2013
USD ($)
Oct. 15, 2019
USD ($)
Fourth Amended and Restated Credit Agreement [Member] | Line Of Credit Converted To Term Loan [Member]                                
Debt Conversion, Converted Instrument, Amount               $ 1,129,478,741                
Fourth Amended and Restated Credit Agreement [Member] | Loans Payable [Member]                                
Collateral Coverage Ratio To Be Maintained On Term Loan Maturity Date                         80.00%      
Debt Instrument Extended Date Period               1 year 180 days                
Cash Balance Resulting In Mandatory Repayments Of Term Loan Principal               $ 20,000,000                
Debt Instrument Initial Cash Margin               3.50%                
Debt Instrument Initial Paid In Kind Margin               2.50%                
Fourth Amended and Restated Credit Agreement [Member] | Liquidity Facility [Member]                                
Excess Cash in Hand, Beyond 20 Million Dollars, Contingent Upon Agreement Parameters.             $ 20,000,000 $ 20,000,000                
Fourth Amended and Restated Credit Agreement [Member] | Pik Loans To Cumulative Convertible Preferred Stock [Member]                                
Par Value Per Share For Conversion Of Pik Loans Into Shares Of Cumulative Convertible Preferred Stock | $ / shares               $ 10                
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending September 30, 2013 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       13.9        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       140.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending December 31 2013 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       12.3        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       160.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending March 31 2014 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       10.6        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       180.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending June 30 2014 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       9.2        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       200.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending September 30, 2014 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       8.5        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       210.00%        
Maximum Collateral Coverage Ratio of Term Loan Indebtedness to EBIDA to be Maintained                     100.00%     80.00%    
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending December 31 2014 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       8.1        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       220.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending March 31 2015 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       7.8        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       220.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending June 30 2015 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       7.6        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       220.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending September 30 2015 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       7.5        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       220.00%        
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending December 31 2015 [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       7.3        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       220.00%        
Fourth Amended and Restated Credit Agreement [Member] | Declining In Intervals Till Quarterly Period Ending March 31, 2017 Upon Extension Of Termination Date [Member]                                
Maximum Leverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       6.2        
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       230.00%        
Maximum Collateral Coverage Ratio of Term Loan Indebtedness to EBIDA to be Maintained                           70.00%    
Fourth Amended and Restated Credit Agreement [Member] | Commencing In Quarterly Period Ending June 30, 2013 [Member]                                
Minimum Interest Coverage Ratio Of Term Loan Indebtedness To EBITDA To Be Maintained                       130.00%        
Fourth Amended and Restated Credit Agreement [Member] | Warrant [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | shares             3,148,584                  
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares             $ 0.01 0.01                
Common Stock, Par or Stated Value Per Share | $ / shares             0.01 0.01                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | $ / shares             7,200,000 7,200,000                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price | $ / shares             $ 2.98 2.98                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate             1.64%                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate             79.30%                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term             10 years                  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate             0.00%                  
Fourth Amended and Restated Credit Agreement [Member] | Next Third [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares             $ 10 10                
Fourth Amended and Restated Credit Agreement [Member] | Last Third [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares             $ 12 $ 12                
Fourth Amended and Restated Credit Agreement [Member]                                
Free Cash To Be Maintained With Agent Per Vessel                 $ 500,000     $ 500,000        
Warrant Amendment [Member] | Warrant [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Exercise Price | $ / shares           $ 2.88                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate           1.33%                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate           83.30%                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term           7 years 328 days                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate           0.00%                    
Forbearance Agreement [Member] | Subsequent Event [Member]                                
Repayments of Lines of Credit $ 3,906,250                              
Line of Credit [Member] | Scenario, Forecast [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Line of Credit Facility, Maximum Borrowing Capacity                               $ 275,000,000
Line of Credit [Member] | Until June 30, 2016 [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Minimum Required Security Cover   165.00%                            
Line of Credit [Member] | Period between July 1, 2016 and October 14, 2017 [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Minimum Required Security Cover   157.50%                            
Line of Credit [Member] | After October 14, 2017 [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Minimum Required Security Cover   165.00%                            
Line of Credit [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Debt Instrument, Basis Spread on Variable Rate     3.50%                          
Line of Credit [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Debt Instrument, Basis Spread on Variable Rate     4.00%                          
Line of Credit [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Line of Credit Facility, Maximum Borrowing Capacity     $ 275,000,000                          
Line of Credit Facility, Commitment Fee Percentage     40.00%                          
Debt Instrument, Covenant Percentage of Aggregate Principal, Minimum Threshold     150.00%                          
Debt Instrument, Covenant Percentage of Aggregate Principal, Maximum Threshold     165.00%                          
Debt Instrument, Covenant Maximum Indebtedness     0.65                          
Debt Instrument, Covenant, EBITDA to Interest Minimum Multiple     2.5                          
Debt Instrument, Covenant, Minimum Liquidity, Minimum Threshold     $ 20,000,000                          
Debt Instrument, Covenant, Minimum Liquidity, Minimum Threshold Per Vessel | $ / item     500,000                          
Debt Instrument, Number of Installments     20                          
Debt Instrument, Periodic Payment     $ 3,906,250                          
Amendment Fee   $ 500,000                            
Revolving Credit Facility [Member] | Scenario, Forecast [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Line of Credit Facility, Maximum Borrowing Capacity                               $ 50,000,000
Revolving Credit Facility [Member] | Restructuring Support Agreement and Plan of Reorganization [Member]                                
Line of Credit Facility, Maximum Borrowing Capacity     50,000,000                          
Long-term Line of Credit                         $ 40,000,000      
Payments of Debt Issuance Costs     $ 5,500,000                          
Line of Credit Facility, Commitment Fee Percentage     40.00%                          
Successor [Member] | Minimum [Member]                                
Debt Instrument, Interest Rate, Effective Percentage                   4.028%     3.696% 4.028%    
Successor [Member] | Maximum [Member]                                
Debt Instrument, Interest Rate, Effective Percentage                   4.037%     4.08% 4.037%    
Successor [Member]                                
Common Stock, Par or Stated Value Per Share | $ / shares                   $ 0.01     $ 0.01 $ 0.01    
Debt, Weighted Average Interest Rate                   4.13%     5.06% 4.13%    
Interest Paid Excluding Payment In Kind                   $ 1,586,303     $ 9,911,793      
Payments of Debt Issuance Costs                            
Predecessor [Member] | Minimum [Member]                                
Debt Instrument, Interest Rate, Effective Percentage                   3.63%       3.63%    
Predecessor [Member] | Maximum [Member]                                
Debt Instrument, Interest Rate, Effective Percentage                   7.40%       7.40%    
Predecessor [Member]                                
Debt, Weighted Average Interest Rate                   2.93%       2.93%    
Interest Paid Excluding Payment In Kind                       10,886,687     $ 47,973,599  
Payments of Debt Issuance Costs                       $ 575,000     $ 48,000  
After Entry of the Interim Order [Member]                                
Debtor-in-Possession Financing, Amount Arranged         $ 25,000,000                      
Extension Option Exercised [Member] | London Interbank Offered Rate (LIBOR) [Member]                                
Debtor in Possession Financing, Spread on Variable Rate         7.00%                      
London Interbank Offered Rate (LIBOR) [Member]                                
Debtor in Possession Financing, Spread on Variable Rate         5.00%                      
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage                         40.00% 0.70%    
Interest Not Accrued During Bankruptcy Proceedings                 $ 14,844,413              
Debtor in Possession, Financing Term         270 days                      
Debtor in Possession Financing, Extension Option         90 days                      
Debtor in Possession Financing, Extension Fee Percentage         0.75%                      
Debtor-in-Possession Financing, Amount Arranged         $ 50,000,000                      
Debtor in Possession Financing, Minimum Liquidity Covenant         $ 22,500,000                      
Charters Agreement Term     1 year 180 days 7 years