Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2022		Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,933		$ 8,229
Accounts receivable, net of allowance for doubtful accounts of $6 and $18 respectively	2,762		2,369
Inventories	1,475		1,429
Investments in available-for-sale debt securities	425		0
Investments in equity securities	247	[1]	0
Due from broker	481		0
Prepaid expenses and other current assets	913		355
Total current assets	8,236		12,382
Property and equipment:
Furniture and fixtures	136		136
Leasehold improvements	6		6
Equipment	972		994
Real property	2,059		2,059
Property and equipment, Gross	3,173		3,195
Accumulated depreciation	997		958
Property and equipment, Net	2,176		2,237
Operating lease assets, net	9		58
Intangible assets, net	2,996		2,866
Deferred income taxes	4,811		4,824
Long-term investments in available-for-sale debt securities	3,011		0
TOTAL ASSETS	21,239		22,367
Current liabilities:
Accounts payable	479		236
Deferred revenue	112		107
Warranty	119		128
Accrued compensation	59		132
Operating lease obligations	10		59
Current maturities of long-term debt	57		56
Other current liabilities	133		181
Total current liabilities	969		899
Long-term debt	1,645		1,674
TOTAL LIABILITIES	2,614		2,573
Shareholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized, none issued or outstanding	0		0
Common stock, $0.01 par value; 20,000,000 shares authorized, 5,398,887 and 5,378,857 issued and outstanding at June 30, 2022 and December 31, 2021, respectively	54		54
Additional paid-in capital	25,452		25,167
Accumulated other comprehensive loss	(543)		(288)
Accumulated deficit	(6,338)		(5,139)
Total shareholders' equity	18,625		19,794
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 21,239		$ 22,367

[1] The fair value of the Company's equity investments are determined based on readily available market data, and are classified as level 1 fair value measurements.