Geographical Customer Concentration and Products Data (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue from External Customer [Line Items]
Net sales	$ 13,676,186	$ 13,386,336	$ 12,099,012
Lockers [Member]
Revenue from External Customer [Line Items]
Net sales	8,327,294	9,522,019	8,961,181
Mailboxes [Member]
Revenue from External Customer [Line Items]
Net sales	2,350,717	2,284,582	2,374,682
Contract Manufacturing [Member]
Revenue from External Customer [Line Items]
Net sales	1,729,898	430,586	451,898
Concession Revenues [Member]
Revenue from External Customer [Line Items]
Net sales	$ 1,268,277	$ 1,149,149	$ 311,251