Quarterly report pursuant to sections 13 or 15(d)

Income Taxes - Additional Information (Detail)

Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Mar. 31, 2013
Income Taxes [Line Items]      
Uncertain tax positions $ 0    
Unrecognized tax benefits 0   0
Interest and penalties on income taxes $ 0 $ 0  
Ownership change description In general, an "ownership change" as defined by Section 382 of the Code, results from a transaction of series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the outstanding stock by a company by certain stockholders or public groups.    
Income Taxes [Line Items]      
Percentage of tax benefit likely to being realized upon settlement 50.00%