Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended
	Apr. 28, 2015	Mar. 31, 2015	Dec. 31, 2014	Apr. 15, 2014	Apr. 30, 2015
Subsequent Event [Line Items]
Restricted cash received from WMMRC		$ 599,588,000	$ 2,447,000
Notes payable – principal		29,838,000	31,220,000
Common stock, par value		$ 0.00001	$ 0.00001
Preferred stock, par value		$ 0.00001	$ 0.00001
First Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Repayment of notes payable-principal				665,000
Repayment of notes payable-interest				11,000
Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Issued aggregate principal amount		9,000,000
Interest rate		13.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Aggregate intrinsic value for restricted shares issued to members by board of directors	700,000
Common stock, par value	$ 0.00001
Preferred stock, par value	$ 0.00001
Subsequent Event [Member] | Minimum [Member]
Subsequent Event [Line Items]
Number of member of board of directors	7
Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Number of member of board of directors	11
Subsequent Event [Member] | Maximum [Member] | Common Stock [Member]
Subsequent Event [Line Items]
Number of shares authorized to issue	3,500,000,000
Subsequent Event [Member] | Maximum [Member] | Preferred Stock [Member]
Subsequent Event [Line Items]
Number of shares authorized to issue	10,000,000
Subsequent Event [Member] | Second Lien Runoff Notes [Member]
Subsequent Event [Line Items]
Notes payable – principal					29,200,000
WMMRC [Member]
Subsequent Event [Line Items]
Restricted cash received from WMMRC		$ 3,100,000