Stock-Based Compensation Arrangements (Employee Stock Purchase Plan) (Detail) (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Shares
Outstanding, beginning of period	5,884,050	2,302,000
Stock options granted	137,000	200,000
Stock options exercised		(252,000)
Restricted stock exercised	0	(2,500)
Canceled/Expired	(1,210,375)	(644,350)
Outstanding, end of period	4,810,675	1,603,150
Exercisable, end of period	723,925	668,700
Weighted Avg Exercise Price
Outstanding, beginning of period	$ 0.43	$ 1.06
Granted	$ 0.35	$ 0.29
Exercised	$ 0	$ 0.32
Restricted stock exercised	$ 0	$ 0
Canceled/Expired	$ 0.43	$ 1.08
Outstanding, end of period	$ 0.43	$ 1.07
Exercisable, end of period	$ 0.71	$ 2.07