Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash	$ 1,964	$ 4,750
Accounts receivable, net of allowance for credit losses of $64 and $87 at December 31, 2023 and 2022, respectively	3,687	3,739
Prepaid expenses and other current assets	1,136	1,136
Income tax receivable	18	339
Total Current Assets	6,805	9,964
Property and equipment:
Computer software	4,774	4,648
Office furniture and equipment	2,253	2,247
Laboratory equipment	16,038	16,013
Leasehold improvements	3,629	3,629
Property, Plant and Equipment, Gross	26,694	26,537
Accumulated depreciation and amortization	(23,633)	(21,964)
Property, Plant and Equipment, Net	3,061	4,573
Other assets	632	823
Deferred tax assets	0	691
Operating lease right-of-use assets	1,828	2,681
Total Assets	12,326	18,732
Current Liabilities:
Accounts payable	752	448
Accrued expenses	2,604	3,939
Current portion of long-term debt	305	294
Current portion of operating lease liabilities	1,048	1,037
Total Current Liabilities	4,709	5,718
Long-term debt	0	305
Long-term portion of operating lease liabilities	945	1,938
Total Liabilities	5,654	7,961
Commitments and Contingencies
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 6,474 shares and 6,349 shares issued at December 31, 2023 and 2022, respectively, 5,806 shares outstanding and 5,681 shares outstanding at December 31, 2023 and 2022, respectively	32	32
Additional paid-in capital	35,129	34,275
Less - Treasury stock, at cost, 668 shares	(10,082)	(10,082)
Accumulated deficit	(16,773)	(11,820)
Accumulated other comprehensive loss	(1,634)	(1,634)
Total Shareholders' Equity	6,672	10,771
Total Liabilities and Shareholders' Equity	$ 12,326	$ 18,732