Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Schedule of Income Tax Provision

		Year Ended December 31,
		2011		2012
Current
Federal	$	-	$	-
Foreign		-		-
State		-		-
Total		-		-
Deferred
Federal		-		-
Foreign		-		-
State		-		-
		-		-
Income tax provision	$	-	$	-

Schedule of Loss Before Income Tax Provision

	Year Ended December 31,
	2011			2012
Domestic	$	(5,671,528	)	$	(7,750,861	)
Foreign		(30,894	)		(6,218	)
	$	(5,702,422	)	$	(7,757,079	)

Reconciliation of Expected Income Tax Benefit Computed Using Federal Statutory Income Tax Rate

	Year Ended December 31,
	2011			2012
Income tax benefit based on federal statutory rate	$	(1,928,000	)	$	(2,637,000	)
State income tax benefit, net of federal income tax		(191,000	)		(216,000	)
Change in deferred tax valuation allowance		1,367,000			849,000
Stock-based compensation		675,000			988,000
Foreign net operating loss					785,000
Other, net		77,000			231,000
Income tax provision	$	-		$	-

Schedule of Deferred Tax Assets and Deferred Tax Liabilities

	December 31, 2011			December 31, 2012
Deferred tax assets:
Domestic net operating loss carryforwards	$	11,411,000		$	13,669,000
Foreign net operating loss carryforwards		1,581,000			798,000
Deferred revenue		-			191,000
Federal and state tax credit		297,000			297,000
Stock-based compensation		1,620,000			586,000
Capitalized costs		1,236,000			1,233,000
Other, net		724,000			944,000
Total gross deferred tax assets		16,869,000			17,718,000
Less valuation allowance on deferred tax assets		(16,869,000	)		(17,718,000	)
Net deferred taxes		-			-
Deferred tax liabilities:
Plant and equipment, principally accelerated depreciation		-			-
Total deferred tax liabilities		-			-
Net deferred taxes	$	-		$	-