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Asset Sale and Loan Restructuring - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 10, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]        
Fair value of asset given up amount $ 19,125,131     $ 19,125,131
Repayment of borrowed money   $ 408,768 $ 158,798 1,808,344
Net carrying book value of assets sold       13,500,000
Fair value of assets sold       19,100,000
Carrying value of assets given up       13,513,223
Gain on debt extinguishment       5,611,907
Gain on restructure of debt       891,345
Undiscounted future cash flows       3,449,632
Inventories [Member]        
Restructuring Cost and Reserve [Line Items]        
Net carrying book value of assets sold       5,100,000
Building and Land [Member]        
Restructuring Cost and Reserve [Line Items]        
Net carrying book value of assets sold       2,100,000
Accounts Receivable [Member]        
Restructuring Cost and Reserve [Line Items]        
Net carrying book value of assets sold       $ 6,300,000
Magellan Offshore Services Ltd [Member]        
Restructuring Cost and Reserve [Line Items]        
Asset acquisition agreement, percentage of net value of traded asset 21.25%      
Asset acquisition agreement, period for transferring amount 5 years      
Monaco [Member]        
Restructuring Cost and Reserve [Line Items]        
Repayment of borrowed money $ 11,700,000