Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash	$ 1,992	$ 2,833
Accounts receivable, net of allowance for doubtful accounts of $89 and $37 at December 31, 2021 and 2020, respectively	4,116	3,356
Prepaid expenses and other current assets	1,499	914
Income tax receivable	2,678	2,495
Total Current Assets	10,285	9,598
Property and equipment:
Computer software	4,521	4,422
Office furniture and equipment	2,195	2,139
Laboratory equipment	16,005	15,978
Leasehold improvements	3,629	3,629
Property, Plant and Equipment, Gross, Ending Balance	26,350	26,168
Accumulated depreciation and amortization	(19,659)	(16,937)
Property, Plant and Equipment, Net, Ending Balance	6,691	9,231
Other assets	864	888
Net deferred tax assets	160	0
Operating lease right-of-use assets	3,552	4,286
Total Assets	21,552	24,003
Current Liabilities:
Accounts payable	994	577
Accrued expenses	3,188	1,801
Current portion of long-term debt	664	688
Current portion of operating lease liabilities	984	875
Total Current Liabilities	5,830	3,941
Long-term debt	599	3,444
Net deferred tax liabilities	0	211
Long-term portion of operating lease liabilities	2,880	3,895
Total Liabilities	9,309	11,491
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 6,257 shares and 6,205 shares issued at December 31, 2021 and 2020, respectively, 5,589 shares outstanding and 5,537 shares outstanding at December 31, 2021 and 2020, respectively	31	31
Additional paid-in capital	33,478	32,803
Less - Treasury stock, at cost, 668 shares	(10,082)	(10,082)
Accumulated deficit	(9,550)	(8,606)
Accumulated other comprehensive loss	(1,634)	(1,634)
Total Shareholders' Equity	12,243	12,512
Total Liabilities and Shareholders' Equity	$ 21,552	$ 24,003