Note 3 - Reserve for Sales Returns and Allowances (Details) - Reserve for Sales Returns and Allowances (Allowance for Sales Returns [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Allowance for Sales Returns [Member]
Note 3 - Reserve for Sales Returns and Allowances (Details) - Reserve for Sales Returns and Allowances [Line Items]
Balance at the beginning of year	$ 793,000	$ 178,000
Provision for returns and allowances	6,024,000	3,062,000
Liability assumed in acquisition of business		645,000
Actual returns and allowances paid to customers	(5,509,000)	(3,092,000)
Balance at the end of year	$ 1,308,000	$ 793,000