Note 11 - Long-term Debt (Detail) - Summary of Applicable Margin (USD $)	Mar. 31, 2013
Level 1 [Member] | Minimum [Member]
Average Excess Availability (in Dollars)	$ 50,000,000
Level 1 [Member] | Base Rate Loans [Member]
Applicable Margin	1.25%
Level 1 [Member] | LIBOR Loans [Member]
Applicable Margin	2.25%
Level 2 [Member] | Maximum [Member]
Average Excess Availability (in Dollars)	50,000,000
Level 2 [Member] | Minimum [Member]
Average Excess Availability (in Dollars)	30,000,000
Level 2 [Member] | Base Rate Loans [Member]
Applicable Margin	1.50%
Level 2 [Member] | LIBOR Loans [Member]
Applicable Margin	2.50%
Level 3 [Member] | Maximum [Member]
Average Excess Availability (in Dollars)	$ 30,000,000
Level 3 [Member] | Base Rate Loans [Member]
Applicable Margin	1.75%
Level 3 [Member] | LIBOR Loans [Member]
Applicable Margin	2.75%