Significant components of our deferred income taxes consist of the following: (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax liabilities:
Excess tax basis convertible debt		$ (257)
Total deferred tax liabilities		(257)
Deferred tax assets:
Net operating loss carryforwards	14,566	15,597
Inventory and other allowances	148	23
Charitable contribution & other carryforwards		9
Excess (tax) book depreciation	31	375
Excess (tax) book amortization	63	61
Share-based compensation	308	624
Other accrued costs	161	138
Total deferred tax assets	15,277	16,827
Less:  Valuation allowance	(15,277)	(16,570)
Deferred income taxes