Note 5. Long-Term Debt - Related Party (Detail) - Debt Cost Expense and Interest Expense Related to Outstanding Borrowings (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Debt cost expense (1)	$ 128	[1]	$ 43	[1]	$ 272	[1]	$ 84	[1]
Interest expense	237		99		431		198
Related Party [Member]
Interest expense	$ 233		$ 96		$ 422		$ 191

[1] Expense through September 19, 2012.