Note 5. Long-Term Debt - Related Party (Detail) (USD $)	6 Months Ended
	Sep. 30, 2012	Sep. 19, 2012	Jun. 25, 2012	Mar. 31, 2012	Sep. 30, 2011
Notes Payable, Related Parties		$ 20,000,000	$ 5,000,000
Related Party Transaction, Amounts of Transaction	5,000,000
Long Term Debt Maximum Amount Lender Agreed To Provide Financial Assistance	3,000,000
Related Party Transaction, Rate	0.84%
Debt Instrument, Convertible, Conversion Price (in Dollars per share)	$ 1.20
Line of Credit Facility, Amount Outstanding				10,000,000	10,000,000
Line of Credit Facility, Increase, Additional Borrowings	5,000,000
Line of Credit Facility, Interest Rate at Period End	7.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.50%
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)	230,000
Fair Value Assumptions, Exercise Price (in Dollars per share)	$ 1.86
Warrants Not Settleable in Cash, Fair Value Disclosure	73,000
Deferred Costs, Noncurrent		1,200,000
Due to Related Parties	15,000,000
Accrued Liabilities, Current	641,000			944,000
Accrued Interest [Member]
Accrued Liabilities, Current	4,000,000
Chairman, Lewis C. Pell [Member]
Related Party Transaction, Amounts of Transaction	$ 15,000,000
Chairman, Lewis C. Pell [Member]
Stock Issued During Period, Shares, Conversion of Convertible Securities (in Shares)	1,880,620