Stock Option Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			1 Months Ended		6 Months Ended	1 Months Ended		3 Months Ended	1 Months Ended	6 Months Ended	1 Months Ended					1 Months Ended								6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Dec. 21, 2011 Thomos Bologna Stock Options	Dec. 21, 2011 Thomos Bologna Stock Options Period 1	Jun. 30, 2012 Thomos Bologna Stock Options Period 1	Dec. 31, 2011 Thomos Bologna Stock Options Period 4	Dec. 21, 2011 Thomos Bologna Stock Options Period 4	Jun. 30, 2011 Thomos Bologna Stock Options Period 4	Dec. 21, 2011 Thomos Bologna Restricted Stock Units (RSUs)	Jun. 30, 2012 Thomos Bologna Restricted Stock Units (RSUs)	Dec. 21, 2011 Minimum Thomos Bologna Stock Options	Dec. 21, 2011 Minimum Thomos Bologna Restricted Stock Units (RSUs)	Dec. 21, 2011 Maximum Thomos Bologna Stock Options	Jun. 30, 2012 Stock Option Plan 2000	Mar. 31, 2000 Stock Option Plan 2000	Mar. 31, 2000 Other Stock Plans Person	Jan. 31, 2011 2006 Stock Plan	Jan. 31, 2010 2006 Stock Plan	Jan. 31, 2009 2006 Stock Plan	Jan. 31, 2008 2006 Stock Plan	Jun. 30, 2012 2006 Stock Plan	Jan. 31, 2012 2006 Stock Plan	Oct. 26, 2006 2006 Stock Plan	Jun. 30, 2012 Employee Stock Option	Jun. 30, 2012 Non Employee Stock Options Minimum	Jun. 30, 2012 Non Employee Stock Options Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized																		1,600,000							2,960,000	2,160,000
Options outstanding	1,592,160		1,592,160		1,870,846												190,000
Number of consultants who were granted stock options																			2
Stock option granted, number of common stock shares			423,500				600,000	600,000	300,000	300,000									16,000
Increase in the number of shares available for issuance																				200,000	200,000	200,000	200,000
Number of options available to grant																								1,367,840
Options expiration period																											10 years
Options vesting period							36 months							18 months		36 months												2 years	3 years
Options outstanding, weighted average exercise price	$ 2.87		$ 2.87		$ 3.67
Non-vested stock options outstanding	680,976		680,976
Non-vested stock options outstanding, Weighted average grant date fair value	$ 1.85		$ 1.85
Unrecognized compensation costs related to non-vested stock options	$ 581,295		$ 581,295
Unrecognized compensation costs related to non-vested stock options, recognition period			2 years 9 months
Stock options granted, average fair value			$ 1.47	$ 1.80
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	270,000
Stock option granted, exercise price			$ 1.82			$ 1.20		$ 1.20
Share based compensation	$ 196,376	$ 290,845	$ 521,384	$ 497,052		$ 103,332					$ 129,000