CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 8,229	$ 8,605
Accounts receivable, net of allowance for doubtful accounts of $18 and $2, respectively	2,369	2,261
Inventories	1,429	770
Prepaid expenses and other current assets	355	480
Total current assets	12,382	12,116
Property and equipment:
Furniture and fixtures	136	154
Leasehold improvements	6	6
Equipment	994	1,215
Real property	2,059	0
Total property and equipment	3,195	1,375
Accumulated depreciation	958	1,072
Net property and equipment	2,237	303
Intangible assets, net	2,866	3,161
Deferred income taxes	4,824	5,708
Operating lease asset, net	58	136
TOTAL ASSETS	22,367	21,424
Current liabilities:
Accounts payable	236	547
Deferred revenue	107	37
Warranty	128	141
Accrued compensation	132	148
Operating lease obligation	59	126
Short-term debt	56	349
Other current liabilities	181	124
Total current liabilities	899	1,472
Non-current liabilities
Operating lease obligation	0	8
Long-term debt	1,674	574
TOTAL LIABILITIES	2,573	2,054
Commitments and contingencies (Note 16)
Shareholders' equity
Preferred stock, $.01 par value; - shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value; 20,000,000 shares authorized, 5,378,857 and 5,352,626 issued and outstanding, respectively	54	54
Additional paid-in capital	25,167	24,968
Accumulated other comprehensive loss	(288)	(150)
Accumulated deficit	(5,139)	(5,502)
Total shareholders' equity	19,794	19,370
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 22,367	$ 21,424