Income Taxes (Details 1) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Allowance for doubtful accounts	$ 20,534	$ 11,682
Inventory allowances	255,285	181,170
Accrued liabilities	73,929	70,765
Unicap 263A adjustment	151,625	151,625
Net operating loss carryforwards	602,580	955,717
Alternative minimum tax credit carryforwards	348,867	351,619
State investment tax credit carryforward	34,523	30,512
Foreign tax credit carryforward	615,080	298,635
Other foreign tax items	600,844	246,473
Total deferred tax assets	2,703,267	2,298,198
Deferred tax liabilities:
Tax over book basis of capital assets	(1,113,335)	(1,175,615)
Other foreign tax items	(207,607)	(165,099)
Net deferred tax assets	$ 1,382,325	$ 957,484