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Stockholders' Equity (Deficit) - Additional Information (Detail)			1 Months Ended	3 Months Ended
	Feb. 09, 2016	Jun. 09, 2015 USD ($) shares	Mar. 31, 2015 USD ($) $ / shares shares	Mar. 31, 2016 USD ($) Incentive_Plan $ / shares shares	Mar. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reverse stock split, conversion ratio	0.50000	0.16666		0.08333
Common stock shares authorized				75,000,000		75,000,000
Common stock, par value \| $ / shares				$ 0.0001		$ 0.0001
Common stock, value \| $				$ 754		$ 754
Preferred stock, par value \| $ / shares				$ 0.0001		$ 0.0001
Preferred stock, shares authorized				24,963,966		24,963,966
Warrants to purchase shares of common stock outstanding				0		0
Number of stock incentive plans \| Incentive_Plan				2
Stock incentive plan expiration date				Aug. 31, 2015
Share-based compensation \| $				$ 334,629	$ 594,606
Weighted average fair value of options granted \| $ / shares				$ 0
Weighted average estimated fair value of stock options \| $ / shares			$ 8.52		$ 8.52
2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for stock-based compensation		450,000
Mako Resources, LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued			333,333
Common stock, value \| $			$ 2,520,000		$ 2,520,000
Oceanica Resources S. de. R.L [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares termination of option to acquire			6,000,000		6,000,000
Warrants Attached to Senior Convertible Debt [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants to purchase shares of common stock outstanding				130,208
Warrants exercise price \| $ / shares				$ 43.20
Warrants expiration date				Nov. 09, 2016
Board Of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reverse stock split ratio				1-for-2
Series AA-1 Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, par value \| $ / shares				$ 0.0001
Preferred stock, shares authorized				8,427,004
Preferred stock Liquidation preference accretion rate				8.00%
Series AA-2 Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, par value \| $ / shares				$ 0.0001
Preferred stock, shares authorized				7,223,145
Series AA-2 Convertible Preferred Stock [Member] \| Penelope Mining LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of trading days				20 days
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares authorized				75,000,000
Minimum [Member] \| Series AA-2 Convertible Preferred Stock [Member] \| Penelope Mining LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of common stock \| $ / shares				$ 15.12
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock shares authorized				150,000,000
Incentive Stock Options [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for stock-based compensation		450,000
Common Stock [Member] \| Incentive Stock Options [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of incentive option granted				With respect to each grant of an ISO to a Participant who is not a Ten Percent Stockholder, the Exercise Price shall not be less than the Fair Market Value of a Share on the date the ISO is granted. With respect to each grant of an ISO to a Participant who is a Ten Percent Stockholder, the Exercise Price shall not be less than one hundred ten percent (110%) of the Fair Market Value of a Share on the date the ISO is granted.
Maximum aggregate number of Shares with respect to one or more Awards that may be granted to any one person during any calendar year		83,333
Maximum aggregate amount of cash that may be paid in cash to any person during any calendar year \| $		$ 2,000,000
Common Stock [Member] \| Incentive Stock Options [Member] \| Minimum [Member] \| 2015 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible employee threshold percentage				10.00%
Purchase price of common stock percentage				110.00%