Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 4,750	$ 1,992
Accounts receivable, net of allowance for doubtful accounts of $87 and $89 at December 31, 2022 and 2021, respectively	3,739	4,116
Prepaid expenses and other current assets	1,136	1,499
Income tax receivable	339	2,678
Total Current Assets	9,964	10,285
Property and equipment:
Computer software	4,648	4,521
Office furniture and equipment	2,247	2,195
Laboratory equipment	16,013	16,005
Leasehold improvements	3,629	3,629
Property, Plant and Equipment, Gross, Ending Balance	26,537	26,350
Accumulated depreciation and amortization	(21,964)	(19,659)
Property, Plant and Equipment, Net, Total	4,573	6,691
Other assets	823	864
Deferred tax assets	691	160
Operating lease right-of-use assets	2,681	3,552
Total Assets	18,732	21,552
Current Liabilities:
Accounts payable	448	994
Accrued expenses	3,939	3,188
Current portion of long-term debt	294	664
Current portion of operating lease liabilities	1,037	984
Total Current Liabilities	5,718	5,830
Long-term debt	305	599
Long-term portion of operating lease liabilities	1,938	2,880
Total Liabilities	7,961	9,309
Commitments and Contingencies (Note 9)
Shareholders' Equity:
Preferred stock, $0.005 par value, 873 shares authorized, no shares issued or outstanding	0	0
Common stock, $0.005 par value; 50,000 shares authorized 6,349 shares and 6,257 shares issued at December 31, 2022 and 2021, respectively, 5,681 shares outstanding and 5,589 shares outstanding at December 31, 2022 and 2021, respectively	32	31
Additional paid-in capital	34,275	33,478
Less - Treasury stock, at cost, 668 shares	(10,082)	(10,082)
Accumulated deficit	(11,820)	(9,550)
Accumulated other comprehensive loss	(1,634)	(1,634)
Total Shareholders' Equity	10,771	12,243
Total Liabilities and Shareholders' Equity	$ 18,732	$ 21,552