Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 2,555	$ 2,552
Restricted cash	1,473	1,101
Accounts receivable, net of allowances of $304 and $262, respectively	1,635	1,682
Unbilled revenue	3,124	5,005
Income tax receivable	102	102
Inventories, net of allowances of $4,118 and $3,871, respectively	8,469	9,563
Prepaid expenses and other current assets	1,308	1,399
Total current assets	18,666	21,404
Property and equipment, at cost:
Machinery and equipment	5,543	5,542
Leasehold improvements	899	899
Total property and equipment, at cost	6,442	6,441
Less: Accumulated depreciation	(3,295)	(3,057)
Net property and equipment	3,147	3,384
Right-of-use lease assets	1,302	1,540
Intangibles, net of accumulated amortization	629	709
Goodwill	58	58
Other assets	207	123
Total assets	24,009	27,218
Current liabilities:
Accounts payable	8,755	9,407
Accrued expenses	1,552	1,445
Deferred revenue	207	148
Right-of-use lease obligations, current	1,069	1,204
Finance lease obligations, current	645	636
Other current liabilities	532	442
Total current liabilities	12,760	13,282
Right-of-use lease obligations, long-term	463	635
Finance lease obligations, long-term	1,088	1,254
Total liabilities	14,311	15,171
Shareholders’ equity:
Common stock, $0.01 par value; 30,000,000 shares authorized; 14,788,857 and 14,132,033 shares issued and outstanding, respectively	148	141
Paid in capital	2,977	2,585
Retained earnings	6,573	9,321
Total shareholders’ equity	9,698	12,047
Total liabilities and shareholders’ equity	$ 24,009	$ 27,218