Excess Reorganization Value, Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 441,000			$ 441,000
Finite-lived intangible assets	4,232,000			$ 4,232,000
Weighted average life of finite-lived intangible assets				4 years
Finite-lived intangible assets, accumulated amortization	4,546,000			$ 4,546,000
Amortization expense	$ 346,000		$ 346,000	$ 691,000	$ 691,000
Impairment of excess reorganization value and goodwill		$ 0