Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Taxes [Abstract]

Schedule of Net Loss Before Income Taxes

	For the Years Ended
	December 31,
	2018		2017
Domestic, current	$	(9,542)	$	(7,995)
Total	$	(9,542)	$	(7,995)

Schedule of Deferred Taxes

	For the Years Ended
	December 31,
	2018		2017
Deferred tax assets:
Federal and state net operating loss carryforwards	$	30,350	$	28,399
Research and development tax credit carryforwards		2,438		2,338
Stock based compensation		1,470		1,674
Other provision and expenses not currently deductible		1,345		877
Total deferred tax assets		35,603		33,288
Deferred tax liabilities:
Depreciation and amortization		(726)		(721)
Prepaid expenses		(151)		(94)
Total deferred liabilities		(877)		(815)
Less valuation allowance		(34,726)		(32,473)
Net deferred tax asset	$	—	$	—

Schedule of Federal Net Operating Losses and Tax Credit Carryforwards

		Net		Research and
		Operating		Development
		Losses		Tax Credits
	(in thousands)
2018-2020	$	30,281	$	809
2021-2024		41,283		-
2025-2037		71,055		1,629
	$	142,619	$	2,438

Schedule of Reconciliation of Effective Tax Rate

	For the Years Ended
	December 31,
	2018			2017
U.S. Federal income tax benefit at federal statutory rate		21	%		34	%
Change in valuation allowance as a result of TCJA		-			(228)
Change in valuation allowance		(21)			217
Cumulative adjustment for NQSO compensation expense		(3)			(24)
Other, net		3			1
Effective tax rate		-	%		-	%