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Consolidated Statements of Income - USD ($)
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
REVENUE      
Recovered cargo sales and other $ 11,854 $ 7,057 $ 1,943,709
Exhibit     58,352
Expedition 1,236,623 4,675,978 3,328,190
Total revenue 1,248,477 4,683,035 5,330,251
OPERATING EXPENSES      
Cost of sales - recovered cargo and other     1,447,331
Operations and research 3,438,389 8,267,401 11,428,506
Gain on sale of marine assets   (992,595)  
Marketing, general and administrative 6,167,181 7,959,122 11,458,528
Common stock issued for subsidiary stock option settlement     2,520,000
Total operating expenses 9,605,570 15,233,928 26,854,365
LOSS FROM OPERATIONS (8,357,093) (10,550,893) (21,524,114)
OTHER INCOME OR (EXPENSE)      
Interest income 112   137
Interest expense (2,727,235) (2,396,994) (4,551,799)
Change in derivative liabilities fair value   3,402,416 (1,175,971)
Gain on debt extinguishment     5,611,907
Other 63,074 467,396 388,595
Total other income or (expense) (2,664,049) 1,472,818 272,869
LOSS BEFORE INCOME TAXES (11,021,142) (9,078,075) (21,251,245)
Income tax benefit (provision) 0 0 0
NET (LOSS) BEFORE NON-CONTROLLING INTEREST (11,021,142) (9,078,075) (21,251,245)
Non-controlling interest 3,261,670 2,762,054 3,044,082
NET (LOSS) $ (7,759,472) $ (6,316,021) $ (18,207,163)
LOSS PER SHARE      
Basic and diluted $ (0.95) $ (0.84) $ (2.46)
Weighted average number of common shares outstanding      
Basic and diluted 8,209,539 7,564,082 7,413,602