Effects of Restatement on Consolidated Balance Sheet (Parenthetical) (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Apr. 30, 2011
Temporary Equity, authorized	880,000	880,000
Temporary Equity, issued			759,773
Temporary Equity, outstanding	726,023	752,273
Common stock, no par value
Common stock, authorized	100,000,000	100,000,000
Common stock, shares issued	26,188,550	25,007,261
Common stock, shares outstanding	26,188,550	25,007,261
10% Convertible Preferred Stock
Temporary Equity, no par value
Temporary Equity, authorized	880,000	880,000
Temporary Equity, issued	726,023	752,273
Temporary Equity, outstanding	726,023	752,273
Redeemable Common Stock
Temporary Equity, no par value
Temporary Equity, issued		250,000
Temporary Equity, outstanding		250,000
As Previously Reported
Common stock, no par value
Common stock, authorized		100,000,000
Common stock, shares issued		25,007,261
Common stock, shares outstanding		23,305,704
As Previously Reported | 10% Convertible Preferred Stock
Temporary Equity, no par value
Temporary Equity, authorized		880,000
Temporary Equity, issued		752,273
Temporary Equity, outstanding		752,273
As Previously Reported | Redeemable Common Stock
Temporary Equity, no par value
Temporary Equity, issued		250,000
Temporary Equity, outstanding		250,000