Note 7 - Credit Facilities and Long-Term Debt (Detail) - Components Of Long-Term Debt: (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Total debt, including current portion	$ 54,300	$ 75,670
Less: current portion	7,250	8,000
Total long-term debt	47,050	67,670
Revolving Credit Facility [Member]
Total debt, including current portion	5,300	19,670
Secured Term Loan [Member]
Total debt, including current portion	$ 49,000	$ 56,000