Summary of Significant Accounting Policies - Inventories (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Abstract]
Raw materials	$ 685,578	$ 1,243,523
Work in process	1,308,399	825,466
Finished goods	632,629	1,566,741
Total Inventories	2,626,606	3,635,730
Write-down of inventories	970,419	58,612	41,311
Inadequate raw materials	800,000
Obsolete raw materials	200,000
Shipping costs	$ 0	$ 28,000	$ 134,000