Other Accrued Liabilities - Additional Information (Detail) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Other Accrued Liabilities [Line Items]
Accrued expenses for interest	$ 832,000
Accrued payroll withholding liabilities	1,343,000	$ 1,159,000
Other Accrued Liabilities [Member]
Other Accrued Liabilities [Line Items]
Accrued expenses for services	212,000	73,000
Accrued payroll withholding liabilities	77,000	$ 39,000
Convertible Debt [Member] | Other Accrued Liabilities [Member]
Other Accrued Liabilities [Line Items]
Accrued expenses for interest	$ 832,000