Note 2 - Accounts Receivable (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts Receivable	$ 400,000	$ 400,000
Allowance for Doubtful Accounts Receivable, Charge-offs	0	0
Foreign Receivables
Accounts Receivable, Net	$ 2,200,000	$ 1,400,000