Net Deferred Tax Assets (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Deferred tax assets:
Net operating losses	$ 28,958	$ 28,824
Capital losses	3,907	3,907
Other asset reserves	267	268
AMT credit
Deferred compensation	19	19
Total deferred tax assets	33,151	33,018
Valuation allowance	(31,556)	(31,432)
Deferred tax assets, net	1,595	1,586
Deferred tax liabilities:
State deferreds	(1,595)	(1,586)
Total deferred tax liabilities	(1,595)	(1,586)
Net deferred taxes