Notes Payable - Additional Information (Detail) - USD ($)	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Debt Instrument [Line Items]
Total outstanding amounts of notes	$ 20,450,000		$ 21,743,000	[1]
Principal payments	1,293,000	$ 2,965,000
Cash interest paid on Notes	1,372,000	1,009,000
Collateral Account used for future payments	900,000
Maximum [Member]
Debt Instrument [Line Items]
Collateral Account used for future payments			1,000
PIK Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	19,400,000		19,400,000
Runoff Notes [Member]
Debt Instrument [Line Items]
Total outstanding amounts of notes	20,400,000		21,700,000
13% Senior First Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	$ 110,000,000
Notes maturity date	Mar. 19, 2030
Principal payments	$ 1,300,000		$ 10,400,000
13% Senior Second Lien Notes [Member]
Debt Instrument [Line Items]
Issued aggregate principal amount	$ 20,000,000
Notes maturity date	Mar. 19, 2030
Principal payments from restricted cash	$ 9,000,000
13% Senior First And Second Lien Notes [Member]
Debt Instrument [Line Items]
Cash interest paid on Notes	$ 1,400,000	$ 1,000,000

[1] Balances derived from audited financial statements as of December 31, 2015.