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Consolidated Statements of Income - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
REVENUE      
Recovered cargo sales and other $ 7,057 $ 1,943,709 $ 1,271,398
Exhibit   58,352 51,484
Expedition 4,675,978 3,328,190  
Total revenue 4,683,035 5,330,251 1,322,882
OPERATING EXPENSES      
Cost of sales - recovered cargo and other   1,447,331 247,087
Operations and research 8,267,401 11,428,506 19,477,227
Gain on sale of marine assets (992,595)    
Marketing, general and administrative 7,959,122 11,458,528 9,791,260
Common stock issued for subsidiary stock option settlement   2,520,000  
Total operating expenses 15,233,928 26,854,365 29,515,574
LOSS FROM OPERATIONS (10,550,893) (21,524,114) (28,192,692)
OTHER INCOME OR (EXPENSE)      
Interest income   137 25,302
Interest expense (2,396,994) (4,551,799) (1,560,254)
Change in derivative liabilities fair value 3,402,416 (1,175,971) 1,001,679
(Loss) from unconsolidated entity     (522,500)
Gain on debt extinguishment   5,611,907  
Other 467,396 388,595 104,922
Total other income or (expense) 1,472,818 272,869 (950,851)
LOSS BEFORE INCOME TAXES (9,078,075) (21,251,245) (29,143,543)
Income tax benefit (provision)     481,055
NET (LOSS) BEFORE NON-CONTROLLING INTEREST (9,078,075) (21,251,245) (28,662,488)
Non-controlling interest 2,762,054 3,044,082 2,189,374
NET (LOSS) $ (6,316,021) $ (18,207,163) $ (26,473,114)
LOSS PER SHARE      
Basic and diluted $ (0.84) $ (2.46) $ (3.74)
Weighted average number of common shares outstanding      
Basic and diluted 7,564,082 7,413,602 7,072,553