Income Taxes And Tax Status (Tables)

12 Months Ended

Dec. 31, 2016

Income Taxes And Tax Status [Abstract]

Schedule Of Effective Income Tax Rate Reconciliation

	2016		2015		2014
Tax benefit at statutory rate	$	(7,313,152)	$	(5,805,502)	$	(8,013,445)
State tax benefit		(752,824)		(597,625)		(824,913)
Increase in valuation allowance		8,144,981		6,482,062		8,870,098
Research and development credit		(96,920)		(19,363)		(186,906)
Other		17,915		(59,572)		155,166
	$	-	$	-	$	-

Schedule Of Deferred Tax Assets And Liabilities

	2016		2015
Gross deferred tax assets:
Net operating loss carry-forward	$	115,296,308	$	108,627,053
Research and development credit		7,922,010		7,825,090
Stock compensation		1,885,035		3,477,737
Patents and other		2,119,018		1,999,975
Contingent payment obligation		1,822,634		-
Fixed assets		77,686		104,895
Accrued liabilities		54,137		47,713
Deferred rent		19,574		19,574
Charitable contributions		11,250		11,250
Deferred revenue		7,304		7,868
Capital loss carry-forward		7,657		7,466
Bad debt expense		1,664		-
Inventory		956		23,282
		129,225,233		122,151,903
Less valuation allowance		(129,225,233)		(122,151,903)
Net deferred tax asset	$	-	$	-