Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of reconciliation of income tax expense at the statutory rate to income tax expense at Entity's effective tax rate

A reconciliation of income tax expense at the statutory rate to income tax expense at our effective tax rate is as follows (dollars in thousands):

	2020		2019
Tax Expense (Benefit) Computed at 22.67% and 22.79% of Pretax Income (Loss)	$	(6,373)	$	(7,780)
Changes in Tax Laws	—		—
Foreign Income Tax Expense	—		—
Effect of Change in Valuation Allowance	6,373		7,780
Total Income Tax Expense	$	—	$	—

Schedule of details of the net deferred tax asset

The details of the net deferred tax asset are as follows (dollars in thousands):

	December 31,
	2020		2019
Deferred tax assets:
Net Operating Loss Carryforward	$	59,586	$	52,935
Stock Based Compensation	7,582		7,514
Deferred Revenue	2,310		2,752
General Business Credit	6,872		6,872
Accrued Expenses	185		280
Inventories	666		866
Book over Tax Depreciation	25		18
Other Deferred Tax Assets	387		22
Total Deferred Tax Assets	77,613		71,259
Deferred Tax Liabilities:
Goodwill & Intangible Assets	155		136
Prepaid Expenses	294		332
Total Deferred Tax Liabilities	449		468
Subtotal	77,164		70,791
Valuation Allowance	(77,164)		(70,791)
Net Deferred Tax Asset	$	—	$	—