Note 7 - Equity Investments in and Advances to Unconsolidated Affiliate (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Long Term Advance For Materials [Member] Alpha ProTech Engineered Products [Member]	Dec. 31, 2005 Alpha ProTech Engineered Products [Member]	Dec. 31, 2005 Maple Industries And Associates [Member]	Sep. 30, 2012 Repaid Balance [Member]
Note 7 - Equity Investments in and Advances to Unconsolidated Affiliate (Details) [Line Items]
Equity Method Investment, Ownership Percentage				41.66%	58.34%
Equity Method Investment, Aggregate Cost	$ 1,450,000		$ 942,000	$ 508,000	$ 708,000
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	2,708,000	2,498,000				417,000
Expense To Acquire Inventory	12,772,000	17,011,000
Income (Loss) from Equity Method Investments	210,000	480,000
Equity Method Investments	2,708,000
Cumulative Equity In Income of Unconsolidated Affiliate	2,277,000
Proceeds from Equity Method Investment, Dividends or Distributions	$ 77,000