Note 1 - Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Maximum Maturity Term for Short Term Investments Considered as Cash Equivalents	3 months
Cash and Cash Equivalents, at Carrying Value	$ 5,266,000	$ 2,483,000	$ 4,216,000
Fair Value Percentage of Securities Sold		102.00%
Percentage of Total Revenue Related to Group of Customers	21.00%	35.00%
Shipping and Handling Revenue	100,000	100,000
Advertising Expense	50,000	74,000
Foreign Currency Transaction Gain (Loss), before Tax	(36,000)	13,000
Highly Liquid Investments in Overnight Purchase Agreements
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 3,900,000	$ 1,700,000
Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Deferred Reveune Recognition Period	1 year
Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Deferred Reveune Recognition Period	3 years