Income Taxes And Tax Status (Schedule of Deferred Tax Assets And Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Income Taxes And Tax Status [Abstract]
Net operating loss carry-forward	$ 94,742,725	$ 85,844,921
Research and development credit	7,618,821	7,319,776
Stock compensation	3,548,655	2,882,576
Patents and other	1,828,103	1,770,367
Fixed assets	121,179	125,737
Accrued liabilities	80,204	64,507
Capital loss carry-forward	5,652	38,439
Charitable Contributions	4,500	0
Deferred tax assets, gross	107,949,839	98,046,323
Less valuation allowance	(107,949,839)	(98,006,927)
Deferred tax assets, net	0	39,396
Gains on the cash surrender value of life insurance	0	39,396
Deferred tax liabilities, gross	0	39,396
Net deferred tax asset	$ 0	$ 0