Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

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):

	2021		2020
Tax Expense (Benefit) Computed at 22.62% and 22.67% of Pretax Income (Loss)	$	(6,744)	$	(6,373)
Changes in Tax Laws	—		—
Foreign Income Tax Expense	—		—
Effect of Change in Valuation Allowance	6,744		6,373
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,
	2021		2020
Deferred tax assets:
Net Operating Loss Carryforward	$	66,895	$	59,586
Stock Based Compensation	7,726		7,582
Deferred Revenue	1,846		2,310
General Business Credit	6,872		6,872
Accrued Expenses	174		185
Inventories	88		666
Book over Tax Depreciation	6		25
Other Deferred Tax Assets	865		387
Total Deferred Tax Assets	84,472		77,613
Deferred Tax Liabilities:
Goodwill & Intangible Assets	183		155
Prepaid Expenses	381		294
Total Deferred Tax Liabilities	564		449
Subtotal	83,908		77,164
Valuation Allowance	(83,908)		(77,164)
Net Deferred Tax Asset	$	—	$	—