Stock Option Plans (Narrative) (Details) (USD $)	3 Months Ended			3 Months Ended											1 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2012 Stock Options [Member]	Mar. 31, 2013 Thomos Bologna [Member]	Mar. 31, 2012 Thomos Bologna [Member]	Mar. 31, 2013 Thomos Bologna [Member] Stock Options [Member]	Mar. 31, 2013 Thomos Bologna [Member] Stock Options [Member] Period One [Member]	Mar. 31, 2013 Thomos Bologna [Member] Stock Options [Member] Period Two [Member]	Mar. 31, 2013 Thomos Bologna [Member] Restricted Stock Units (RSUs) [Member]	Mar. 31, 2012 Minimum [Member] Stock Options [Member]	Mar. 31, 2013 Minimum [Member] Thomos Bologna [Member] Stock Options [Member]	Mar. 31, 2013 Minimum [Member] Thomos Bologna [Member] Restricted Stock Units (RSUs) [Member]	Mar. 31, 2012 Maximum [Member] Stock Options [Member]	Mar. 31, 2000 Stock Option Plan 2000 [Member]	Dec. 31, 2012 Stock Option Plan 2000 [Member]	Mar. 31, 2000 Other Stock Plans [Member]	Mar. 31, 2013 2006 Stock Plan [Member]	Dec. 31, 2012 2006 Stock Plan [Member]	Dec. 31, 2011 2006 Stock Plan [Member]	Dec. 31, 2010 2006 Stock Plan [Member]	Dec. 31, 2009 2006 Stock Plan [Member]	Dec. 31, 2008 2006 Stock Plan [Member]	Oct. 26, 2006 2006 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized																210,000			3,570,000					2,160,000
Options outstanding	1,711,643		1,749,310
Number of consultants who were granted stock options																	2
Stock option granted, number of common stock shares	95,000							600,000	300,000						1,600,000		16,000
Increase in the number of shares available for issuance																			200,000	200,000	200,000	200,000	200,000
Increase in the number of shares available for issuance, percent of stock outstanding																		5.00%
Number of options available to grant																		1,858,357
Options expiration period				10 years
Options vesting period								36 months			2 years	18 months		3 years
Options outstanding, weighted average exercise price	$ 2.03		$ 2.12
Non-vested stock options outstanding	938,262
Non-vested stock options outstanding, Weighted average grant date fair value	$ 1.37
Unrecognized compensation costs related to non-vested stock options	$ 678,757
Unrecognized compensation costs related to non-vested stock options, recognition period	3 years 2 months 27 days
Stock options granted, average fair value	$ 1.39	$ 1.47
Average closing price of common stock												$ 1.80	$ 2.40
Number of days, for calculating average closing price of common stock												30 days	30 days
Number of restricted common stock granted										270,000
Stock option granted, exercise price	$ 1.39							$ 1.20	$ 1.20
Share-based compensation	$ 105,324	$ 325,008			$ 44,531	$ 103,332	$ 129,000