Note 3 - Reserve for Sales Returns and Allowances (Detail) - Reserve for Sales Returns and Allowances (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance	$ 272,000	$ 218,000
Provision for returns and allowances	2,203,000	2,419,000
Actual returns and allowances paid to customers	(2,297,000)	(2,365,000)
Balance	$ 178,000	$ 272,000