Inventories, Net (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Raw materials	$ 3,646,000	$ 3,486,000
Work in process	1,098,000	1,388,000
Finished goods	11,773,000	11,576,000
Allowance for excess quantities	(693,000)	(636,000)
Total inventories	$ 15,823,912	$ 15,813,276