Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 12,453,000	$ 15,508,000
Marketable securities	5,631,000	3,775,000
Accounts receivable, net of allowances of $109 and $40, respectively	4,445,000	3,394,000
Inventories, net	6,016,000	4,466,000
Prepaid expenses and other current assets	365,000	242,000
Total Current Assets	28,910,000	27,385,000
Property, Plant and Equipment
Land	536,000	536,000
Buildings and improvements	4,651,000	4,029,000
Machinery and equipment	17,527,000	17,012,000
Gross property, plant and equipment	22,714,000	21,577,000
Less: accumulated depreciation	(19,883,000)	(19,491,000)
Net property, plant and equipment	2,831,000	2,086,000
Intangible assets, net	402,000	477,000
Deferred income taxes, net	3,307,000	127,000
Other assets	102,000
Right-of-use lease asset	331,000
Equity investment in unconsolidated subsidiary	3,334,000
Total Assets	39,217,000	30,075,000
Current Liabilities:
Accounts payable	1,865,000	1,418,000
Accrued compensation and commissions expense	1,832,000	1,143,000
Other accrued expenses	627,000	191,000
Total Current Liabilities	4,324,000	2,752,000
Commitments and Contingencies (Note K)
Stockholders' Equity
Common stock, $0.01 par value - 10,000,000 shares authorized; 5,014,647 shares issued and 4,933,063 shares outstanding at December 31, 2019, and 4,912,762 shares issued and 4,831,178 shares outstanding at December 31, 2018	50,000	49,000
Additional paid-in capital	41,576,000	41,023,000
Accumulated deficit	(6,153,000)	(13,169,000)
Treasury stock, 81,584 shares held in treasury at cost at December 31, 2019 and 2018	(580,000)	(580,000)
Total Stockholders' Equity	34,893,000	27,323,000
Total Liabilities and Stockholders' Equity	$ 39,217,000	$ 30,075,000