Note 11 - Long-term Debt (Detail) - Long-Term Debt Pricing	9 Months Ended	6 Months Ended
	Sep. 30, 2012	Dec. 31, 2012 Ratio I [Member] Scenario, Forecast [Member] Euro Dollar Loans [Member]	Dec. 31, 2012 Ratio I [Member] Scenario, Forecast [Member] Base Rate Loans [Member]	Dec. 31, 2012 Ratio I [Member] Scenario, Forecast [Member]	Jun. 30, 2012 Ratio I [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Ratio I [Member] Base Rate Loans [Member]	Jun. 30, 2012 Ratio I [Member]	Dec. 31, 2012 Ratio II [Member] Scenario, Forecast [Member] Euro Dollar Loans [Member]	Dec. 31, 2012 Ratio II [Member] Scenario, Forecast [Member] Base Rate Loans [Member]	Dec. 31, 2012 Ratio II [Member] Scenario, Forecast [Member]	Jun. 30, 2012 Ratio II [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Ratio II [Member] Base Rate Loans [Member]	Jun. 30, 2012 Ratio II [Member]	Dec. 31, 2012 Ratio III [Member] Scenario, Forecast [Member] Euro Dollar Loans [Member]	Dec. 31, 2012 Ratio III [Member] Scenario, Forecast [Member] Base Rate Loans [Member]	Dec. 31, 2012 Ratio III [Member] Scenario, Forecast [Member]	Jun. 30, 2012 Ratio III [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Ratio III [Member] Base Rate Loans [Member]	Jun. 30, 2012 Ratio III [Member]	Dec. 31, 2012 Ratio IV [Member] Scenario, Forecast [Member] Euro Dollar Loans [Member]	Dec. 31, 2012 Ratio IV [Member] Scenario, Forecast [Member] Base Rate Loans [Member]	Dec. 31, 2012 Ratio IV [Member] Scenario, Forecast [Member]	Jun. 30, 2012 Ratio IV [Member] Euro Dollar Loans [Member]	Jun. 30, 2012 Ratio IV [Member] Base Rate Loans [Member]	Jun. 30, 2012 Ratio IV [Member]	Dec. 31, 2012 Ratio V [Member] Scenario, Forecast [Member] Euro Dollar Loans [Member]	Dec. 31, 2012 Ratio V [Member] Scenario, Forecast [Member] Base Rate Loans [Member]	Dec. 31, 2012 Ratio V [Member] Scenario, Forecast [Member]
Loan Price	3.20%	3.75%	1.50%		3.25%	1.00%		3.25%	1.00%		2.75%	0.50%		2.75%	0.50%		2.50%	0.25%		2.50%	0.25%		2.00%	0.00%		2.00%	0.00%
Applicable Unused Fee Rate	0.50%			0.375%			0.375%			0.375%			0.30%			0.30%			0.25%			0.25%			0.25%			0.25%