Note 9 - Customer Deposits (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Customer Deposits, Current	$ 715,000	$ 263,000	[1]
Domestic Operations [Member]
Customer Deposits, Current	507,000	176,000
International Operations [Member]
Customer Deposits, Current	$ 208,000	$ 87,000

[1] The Balance Sheet at December 31, 2012, is excerpted from the consolidated audited financial statements as of that date but does not include certain information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.