Note 14 - Geographical, Customer Concentration and Products Data (Details) - Net Sales by Product Group (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue from External Customer [Line Items]
Net sales	$ 14,625,889	$ 13,676,186	$ 13,386,336
Operating Segments [Member] | Lockers [Member]
Revenue from External Customer [Line Items]
Net sales	8,501,396	8,327,294	9,522,019
Operating Segments [Member] | Mailboxes [Member]
Revenue from External Customer [Line Items]
Net sales	2,931,640	2,350,717	2,284,582
Operating Segments [Member] | Contract Manufacturing [Member]
Revenue from External Customer [Line Items]
Net sales	1,858,804	1,729,898	430,586
Operating Segments [Member] | Concession Revenues [Member]
Revenue from External Customer [Line Items]
Net sales	$ 1,334,049	$ 1,268,277	$ 1,149,149