Related Parties - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended
	May 03, 2016	Jan. 29, 2016	Apr. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Related Party Transaction [Line Items]
Outstanding accrued interest and prepayment premium conversion, converted amount				$ 17,934
Gross amount				$ 7,375
Common stock, shares outstanding				12,727,741	1,631,738
Common Stock [Member]
Related Party Transaction [Line Items]
Number of shares issued upon 2016 Merger	1,000,004			1,000,004
Common Stock [Member] | Private Placement [Member]
Related Party Transaction [Line Items]
Stock issued during period	5,000,000			5,079,000
Series AB Preferred Stock [Member] | Private Placement [Member]
Related Party Transaction [Line Items]
Conversion of Series AB Preferred Stock to Common Stock, shares			5,900,000
Stock issued during period		4,655,430
Restructured Debt [Member] | Common Stock [Member]
Related Party Transaction [Line Items]
Conversion to Common Stock, shares				396,201
Restructured Debt [Member] | Series AB Preferred Stock [Member]
Related Party Transaction [Line Items]
Outstanding accrued interest and prepayment premium conversion, converted amount				$ 2,100
Number of shares issued upon conversion of debt				1,660,530
Capital Royalty Partners [Member]
Related Party Transaction [Line Items]
Outstanding accrued interest and prepayment premium conversion, converted amount				$ 16,500
Gross amount				$ 12,800
Capital Royalty Partners [Member] | Common Stock [Member]
Related Party Transaction [Line Items]
Number of shares issued upon conversion of debt				4,649,859
Number of shares issued upon 2016 Merger				5,487,766
Proceeds from private placement				$ 20,000
Common stock, shares outstanding				9,487,763
Capital Royalty Partners [Member] | Common Stock [Member] | Private Placement [Member]
Related Party Transaction [Line Items]
Stock issued during period				4,000,000
Capital Royalty Partners [Member] | Series AB Preferred Stock [Member]
Related Party Transaction [Line Items]
Number of shares issued upon conversion of debt				8,609,824
Issuance of preferred stock as a result of the exercise of warrants shares				10,276,030
Capital Royalty Partners [Member] | Series AB Preferred Stock [Member] | Common Stock [Member]
Related Party Transaction [Line Items]
Conversion to Common Stock, shares				2,053,959
Conversion of Series AB Preferred Stock to Common Stock, shares				2,518,089