Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 29,016	$ 18,331
Marketable securities	16,167	5,791
Accounts receivable, net of allowances of $208 and $189, respectively	4,667	4,122
Inventories, net	5,492	5,280
Prepaid expenses and other current assets	494	257
Total Current Assets	55,836	33,781
Property, Plant and Equipment
Land	536	536
Buildings and improvements	4,869	4,810
Machinery and equipment	18,815	17,775
Gross property, plant and equipment	24,220	23,121
Less: accumulated depreciation	(20,837)	(20,336)
Net property, plant and equipment	3,383	2,785
Right-of-use lease asset	396	422
Equity investment in unconsolidated subsidiary		3,072
Intangible assets, net	252	327
Deferred income tax asset	34	3,052
Other assets	5	16
Total Assets	59,906	43,455
Current Liabilities:
Accounts payable	1,455	1,240
Accrued compensation and commissions expense	1,549	1,324
Income taxes payable	599	25
Other accrued expenses and liabilities	823	808
Total Current Liabilities	4,426	3,397
Deferred income tax liability	124
Other liabilities	613	293
Total Liabilities	5,163	3,690
Contingencies (Note O)
Stockholders' Equity
Common stock, $0.01 par value - 30,000,000 and 10,000,000 shares authorized as of December 31, 2021 and 2020, respectively; 5,446,840 shares issued and 5,308,973 shares outstanding at December 31, 2021, and 5,409,550 shares issued and 5,272,204 shares outstanding at December 31, 2020	53	53
Additional paid-in capital	45,817	45,477
Retained earnings (accumulated deficit)	9,453	(5,185)
Treasury stock, 81,584 shares held in treasury at cost at December 31, 2021 and 2020	(580)	(580)
Total Stockholders' Equity	54,743	39,765
Total Liabilities and Stockholders' Equity	$ 59,906	$ 43,455