Note 18 - Quarterly Consolidated Financial Data (Detail) - Quarterly Consolidated Financial Data (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net revenues	$ 43,376	$ 47,266
Gross margin	19,059	22,893
Earnings before income tax expense (benefit)	3,053	7,659
Income tax expense (benefit)	897	(2,204)
Net earnings	2,156	9,863
Net earnings per common share - basic (in Dollars per share)	$ 0.21	$ 0.97
Weighted average common shares outstanding - basic (in Shares)	10,273,377	10,147,708
Net earnings per common share - diluted (in Dollars per share)	$ 0.21	$ 0.96
Weighted average common shares outstanding - diluted (in Shares)	10,347,077	10,285,621
3/31 [Member]
Net revenues	10,731	11,704
Gross margin	4,596	5,093
Earnings before income tax expense (benefit)	(71)	1,317
Income tax expense (benefit)	(28)	60
Net earnings	(43)	1,257
Net earnings per common share - basic (in Dollars per share)	$ 0.00	$ 0.13
Weighted average common shares outstanding - basic (in Shares)	10,205,114	10,067,748
Net earnings per common share - diluted (in Dollars per share)	$ 0.00	$ 0.12
Weighted average common shares outstanding - diluted (in Shares)	10,205,114	10,266,644
6/30 [Member]
Net revenues	13,576	13,800
Gross margin	6,194	6,798
Earnings before income tax expense (benefit)	1,994	2,733
Income tax expense (benefit)	660	78
Net earnings	1,334	2,655
Net earnings per common share - basic (in Dollars per share)	$ 0.13	$ 0.26
Weighted average common shares outstanding - basic (in Shares)	10,273,812	10,146,613
Net earnings per common share - diluted (in Dollars per share)	$ 0.13	$ 0.26
Weighted average common shares outstanding - diluted (in Shares)	10,359,657	10,296,902
9/30 [Member]
Net revenues	10,799	11,681
Gross margin	4,762	6,133
Earnings before income tax expense (benefit)	1,012	2,420
Income tax expense (benefit)	348	(2,762)
Net earnings	664	5,182
Net earnings per common share - basic (in Dollars per share)	$ 0.06	$ 0.51
Weighted average common shares outstanding - basic (in Shares)	10,302,417	10,182,795
Net earnings per common share - diluted (in Dollars per share)	$ 0.06	$ 0.50
Weighted average common shares outstanding - diluted (in Shares)	10,360,377	10,297,284
12/31 [Member]
Net revenues	8,270	10,081
Gross margin	3,507	4,869
Earnings before income tax expense (benefit)	118	1,189
Income tax expense (benefit)	(83)	420
Net earnings	$ 201	$ 769
Net earnings per common share - basic (in Dollars per share)	$ 0.02	$ 0.08
Weighted average common shares outstanding - basic (in Shares)	10,311,428	10,191,927
Net earnings per common share - diluted (in Dollars per share)	$ 0.02	$ 0.08
Weighted average common shares outstanding - diluted (in Shares)	10,343,793	10,281,364