Note 6 - Short-term Borrowings (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Line of Credit Facility, Interest Rate at Period End	6.00%	6.50%
Secured Borrowings Limit, Accounts Receivable, Percentage	80.00%
Secured Borrowings Limit, Inventory, Percentage	10.00%
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 1,250,000
Line of Credit Facility, Current Borrowing Capacity (in Dollars)	1,250,000
Line of Credit Facility, Amount Outstanding (in Dollars)	$ 0
Line of Credit [Member]
Line of Credit Facility, Interest Rate at Period End	6.00%