Major Classes of Assets and Liabilities (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Receivables, net	$ 3,000
Prepaid expenses and other current assets	4,000
Total current assets	7,000	$ 184,000
Other assets	19,000
Total assets	26,000
Current liabilities:
Accounts payable and accrued expenses	1,318,000
Total current liabilities	1,318,000	$ 4,858,000
Long-term lease obligations	989,000
Total liabilities	$ 2,307,000