Going Concern - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Going Concern [Line Items]
Accumulated deficit	$ 126,945,000	$ 126,016,000
Total stockholders' deficit	(1,328,000)	(837,000)
Cash and cash equivalents	89,000	208,000	$ 374,000	$ 1,744,000
Accounts payable, trade and accrued liabilities	856,000	$ 849,000
Working capital balance	$ 1,326,000