CONSOLIDATED BALANCE SHEETS (Unaudited Consolidated Condensed) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash	$ 1,077	$ 957
Trade accounts receivable, less allowance for doubtful accounts of $9 for both June 30, 2021 and December 31, 2020	3,396	2,932
Inventories, net	5,621	4,340
Prepaid expenses and other current assets	720	606
Total current assets	10,814	8,835
Equipment and leasehold improvements, net	3,429	2,868
Operating leases, right of use	1,785	1,827
Other assets, net	9	10
Total assets	16,037	13,540
Current liabilities:
Line of credit, bank		500
Line of credit, related party	2,310	2,155
Current portion of long-term debt, related party	1,000	500
Current portion of finance lease obligations	158	177
Current portion of operating lease obligations	499	431
Accounts payable	2,623	2,126
Deferred revenue	441	411
Accrued expenses	954	484
Total current liabilities	7,985	6,784
Long-term portion of finance lease obligations	36	110
Long-term portion of operating lease obligations	1,523	1,651
Long-term convertible loan, related party		1,097
PPP Loan (SBA)		952
Asset retirement obligations	218	214
Total long-term liabilities	1,777	4,024
Contingent liabilities
Shareholders’ equity:
Preferred stock, $.01 par value, 24,088 shares authorized, and no shares issued and outstanding
Common stock, $.01 par value, 55,000,000 shares authorized; 48,460,347 and 38,221,292 shares issued and outstanding on June 30, 2021 and December 31, 2020, respectively	485	382
Additional paid-in capital	104,206	102,117
Accumulated deficit	(98,416)	(99,767)
Total Shareholders’ equity	6,275	2,732
	$ 16,037	$ 13,540