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Long-Term Debt (Parenthetical) (Detail) (USD $)
2 Months Ended 1 Months Ended 2 Months Ended
Mar. 31, 2014
10% Senior Subordinated Convertible Notes redeemed in fiscal year 2014
Mar. 31, 2014
9% Senior Subordinated Convertible Notes due February 15, 2016
Jan. 31, 2014
9% Senior Subordinated Convertible Notes due February 15, 2016
Feb. 21, 2013
8% Senior Subordinated Convertible Notes due February 1, 2015
Mar. 31, 2014
8% Senior Subordinated Convertible Notes due February 1, 2015
Debt Instrument [Line Items]          
Debt, interest rate 10.00% 9.00%     8.00%
Debt discount   $ 137,393 $ 186,897    
Debt instrument, maturity date   Feb. 15, 2016   Feb. 01, 2015 Feb. 01, 2015