Stock-Based Compensation - The assumptions used to value options granted (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	$ 107,457	$ 143,342	$ 483,893
Employee Benefits and Share-based Compensation	645,588	802,293	2,661,812
Share based compensation	668,392	814,520	2,800,256
Cost of revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	22,804	12,227	138,444
Selling and distribution [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	0	0	1,118,221
General and administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	605,349	723,034	1,297,927
Research and development [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense allocation	$ 40,239	$ 79,259	$ 245,664