Note 3 - Reserve for Sales Returns and Allowance (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Reserve for Sales Returns and Allowances [Table Text Block]

	2016			2015			2014
Balance at the beginning of year	$	1,384,000		$	1,308,000		$	793,000
Provision for returns and allowances		4,445,000			4,547,000			6,024,000
Actual returns and allowances paid to customers		(3,862,000	)		(4,471,000	)		(5,509,000	)
Balance at the end of year	$	1,967,000		$	1,384,000		$	1,308,000