Accounting Policies and Recent Accounting Pronouncements (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property and equipment [Line Items]
Value of inventory	$ 195,000				$ 0				$ 195,000	$ 0
Long-lived assets [Abstract]
Impairment of long-lived assets									0	0
Grant Revenue [Line Items]
Grant proceeds	195,000	0	0	0	0	0	201,000	381,000	195,000	582,000	0
Net loss per common share [Abstract]
Potential common stock issuable upon exercise of stock options and warrants (in shares)									11.9	15.4	5.3
Business segments [Abstract]
Number of operating segments									1
SBIR [Member]
Grant Revenue [Line Items]
Grant awarded	600,000				581,839				600,000	581,839
Grant proceeds									$ 195,093		$ 244,480
Minimum [Member]
Property and equipment [Line Items]
Estimated useful life of property and equipment									3 years
Maximum [Member]
Property and equipment [Line Items]
Estimated useful life of property and equipment									10 years