Condensed Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 581,000	$ 4,000
Accounts receivable, net of allowance for doubtful accounts of $34,000 at March 31, 2020 and at December 31, 2019	396,000	370,000
Inventory, net of allowance of $304,000 at March 31, 2020 and $291,000 at December 31, 2019	723,000	810,000
Prepaid expenses and other current assets	262,000	6,000
Right of use asset - operating leases	37,000	34,000
Total current assets	1,999,000	1,224,000
Property, plant and equipment, net	626,000	644,000
Patents, net	114,000	116,000
Right of use asset - operating leases	64,000	73,000
Other assets	21,000	21,000
Total assets	2,824,000	2,078,000
Current liabilities
Accounts payable	695,000	652,000
Accrued expenses and other current liabilities	1,334,000	543,000
Right of use liability - operating leases	34,000	34,000
Wages payable	139,000	104,000
Line of credit	322,000	337,000
Current portion of long-term debt, net of deferred finance costs	1,124,000	17,000
Total current liabilities	3,648,000	1,687,000
Long-term debt/other liabilities, net of current portion and deferred finance costs	0	1,108,000
Right of use liability - operating leases	64,000	73,000
Total liabilities	3,712,000	2,868,000
COMMITMENTS AND CONTINGENCIES
Stockholders' deficit:
Preferred stock; par value $.01 per share; 5,000,000 shares authorized, none issued and outstanding at March 31, 2020 and December 31, 2019	0	0
Common stock; par value $.01 per share; 50,000,000 shares authorized; 35,847,093 issued and outstanding at March 31, 2020 and 32,279,368 issued and outstanding as of December 31, 2019	358,000	327,000
Additional paid-in capital	21,632,000	21,437,000
Accumulated deficit	(22,878,000)	(22,554,000)
Total stockholders' deficit	(888,000)	(790,000)
Total liabilities and stockholders' deficit	$ 2,824,000	$ 2,078,000